CN103135318A - Changeable lens, camera, and camera system - Google Patents
Changeable lens, camera, and camera system Download PDFInfo
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- CN103135318A CN103135318A CN2012105061021A CN201210506102A CN103135318A CN 103135318 A CN103135318 A CN 103135318A CN 2012105061021 A CN2012105061021 A CN 2012105061021A CN 201210506102 A CN201210506102 A CN 201210506102A CN 103135318 A CN103135318 A CN 103135318A
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Abstract
The invention provides a changeable lens, a camera, and a camera system, which are capable of conducting micro adjustment of a focus nearby a focusing position with good operability and conducting drive control of the focusing lens in high precision. The camera system is composed of the changeable lens and a camera main body on which the changeable lens can be mounted. The changeable lens comprises a first focusing lens group having a first image surface movement quantity relative to a unit drive quantity; a second focusing lens group having a second image surface movement quantity relative to the unit drive quantity and smaller than the first image surface movement quantity; and a lens drive controlling part used for selecting the first focusing lens group or the second focusing lens group according to an instruction from the camera main body when an MF operation part is operated under the state that the changeable lens is installed on the camera main body, and for conducting drive control of the selected first focusing lens group or the selected second focusing lens group according to operations of the MF operation part.
Description
Technical field
The present invention relates to by phtographic lens and camera arrangement that the camera body of phtographic lens consists of can be installed, can be arranged on replacing camera lens and camera on camera body.
Background technology
In recent years, the progress of image documentation equipment is remarkable, particularly carried out digitizing by replacing with imaging apparatus to the silver film that image is photographed in the camera field, thereby replaced optical profile type view finder in the past and carry gradually the demonstration that utilized liquid crystal panel or organic EL etc. with monitor or electronic viewfinder (EVF).
But, in the situation that above-mentioned demonstration is with monitor or EVF, show light quantity and the easy reverse side of the advantages such as composition in the visual confirmation photographic picture having all shot object images to be presented at imaging on imaging apparatus and regulate during at night photography etc., there is shortcoming as described below: with the comparisons such as optical profile type view finder of carrying on single-lens reflex camera, due to the trickle variation that is difficult to know focus, therefore there is the shortcoming of the focusing when being difficult to carry out accurately manual focus (MF).
As the method that addresses this is that, propose to have when carrying out the MF operation to show the method for amplifying to show with the part of the image on monitor or EVF by push-botton operation and focusing ring operation to being presented at.
[prior art document]
[patent documentation]
[patent documentation 1] Japanese kokai publication hei 11-298791 communique
[patent documentation 2] TOHKEMY 2010-51037 communique
But, in the situation that in above-mentioned patent documentation 1 and patent documentation 2, disclosed scheme has been amplified the demonstration image when MF operates, because the driving control method of focus lens is identical when not amplifying, therefore easily carry out the confirmation of focusing state, but image planes change with respect to focus lens move highly sensitive the time, have the problem that is difficult to carry out near the trickle focusing focusing position.
In addition, in the lens construction of the preferential and focus lens that sensitivity that image planes change is low of the operability when employing makes the fine adjustment of carrying out focus, when defocus amount is large, produce till making focus lens move near focusing position the problem than spended time.
And, when automatically focusing (AF) in the phtographic lens of the highly sensitive focus lens of having to use image planes as above to change, same when also operating with MF, the problems such as the difficulty that near the driving of the focus lens focusing position is controlled is high, and the high-precision AF control of the very difficult execution of existence and AF control time are elongated.
Summary of the invention
The object of the invention is to, address the above problem, provide and to carry out near the fine adjustment of the focus focusing position and can carry out replacing camera lens, camera and the camera arrangement that the driving of high-precision focus lens is controlled with good operability.
The replacing camera lens of the 1st invention, it can be arranged on camera body, and this replacing camera lens has: the 1st focusing lens group, it has the 1st image planes amount of movement with respect to the unit amount of movement; The 2nd focusing lens group, it has the 2nd image planes amount of movement less than the 1st image planes amount of movement with respect to the unit amount of movement; The MF operating portion, it is used for carrying out manual focus; The lens driving control part, it is when having operated described MF operating portion, select described the 1st focusing lens group or described the 2nd focusing lens group, according to the operation of described MF operating portion, selected described the 1st focusing lens group or described the 2nd focusing lens group are driven control.
The camera of the 2nd invention, it has a plurality of focusing lens groups, and this camera has: the 1st focusing lens group, it has the 1st image planes amount of movement with respect to the unit amount of movement; The 2nd focusing lens group, it has the 2nd image planes amount of movement less than the 1st image planes amount of movement with respect to the unit amount of movement; The MF operating portion, it is used for carrying out manual focus; And lens driving control part, it is when having operated described MF operating portion, select described the 1st focusing lens group or described the 2nd focusing lens group, according to the operation of described MF operating portion, selected described the 1st focusing lens group or described the 2nd focusing lens group are driven control.
The camera arrangement of the 3rd invention, it consists of with the camera body that this replacing camera lens can be installed by changing camera lens, described camera body has the camera body control part that can communicate with described replacing camera lens, described replacing camera lens has: the 1st focusing lens group, and it has the 1st image planes amount of movement with respect to the unit amount of movement; The 2nd focusing lens group, it has the 2nd image planes amount of movement less than the 1st image planes amount of movement with respect to the unit amount of movement; The MF operating portion, it is used for carrying out manual focus;
Department of Communication Force, itself and described camera body communicate; The lens driving control part, when having operated described MF operating portion under the state that described replacing camera lens is arranged on described camera body, this lens driving control part is by the indication of described Department of Communication Force reception from the camera body control part, indicate to select described the 1st focusing lens group or described the 2nd focusing lens group according to this, according to the operation of described MF operating portion, selected described the 1st focusing lens group or described the 2nd focusing lens group are driven control.
the camera arrangement of the 4th invention, it consists of with the camera body that this replacing camera lens can be installed by changing camera lens, and described replacing camera lens has: the 1st focusing lens group, it has the 1st image planes amount of movement with respect to the unit amount of movement, the 2nd focusing lens group, it has the 2nd image planes amount of movement less than the 1st image planes amount of movement with respect to the unit amount of movement, and lens driving control part, it is controlled according to the driving of carrying out described the 1st focusing lens group or described the 2nd focusing lens group from the indication of described camera body, described camera body has focus detection section, this focus detection section detects the focus condition of described the 1st focusing lens group and described the 2nd focusing lens group and calculates focusing position, described lens driving control part drives described the 1st focusing lens group to the focusing position from described camera body indication, and calculate the stop position of described the 1st focusing lens group that the driving resolution by described the 1st focusing lens group causes and the side-play amount between focusing position, carry out the driving of described the 2nd focusing lens group according to the described side-play amount of calculating.
The invention effect
According to the present invention, can provide and to carry out near the fine adjustment of the focus focusing position and can carry out replacing camera lens, camera and the camera arrangement that the driving of high-precision focus lens is controlled with good operability.
Description of drawings
Fig. 1 is the block diagram of configuration example that the camera arrangement of one embodiment of the present invention is shown.
Fig. 2 is the electrical diagram of configuration example that the camera arrangement of one embodiment of the present invention is shown.
Fig. 3 is the process flow diagram of an example of processing that the camera arrangement of one embodiment of the present invention is shown.
Fig. 4 is the process flow diagram of an example of processing that the camera arrangement of one embodiment of the present invention is shown.
Fig. 5 is the sequential chart of an example that the synchronous communication of the replacing camera lens of one embodiment of the present invention and camera body is shown.
Fig. 6 is the process flow diagram that an example of the processing that the MF Operational Figure Of Merit of the camera arrangement of one embodiment of the present invention sets is shown.
Fig. 7 is the figure of an example of the drive actions of the focusing lens group when the MF pattern of camera arrangement of one embodiment of the present invention is shown.
Fig. 8 is the process flow diagram that the example that the AF of the camera arrangement of one embodiment of the present invention processes is shown.
Fig. 9 is the figure of an example of AF action that the camera arrangement of one embodiment of the present invention is shown.
Figure 10 is the process flow diagram that an example of the processing that the MF Operational Figure Of Merit of the camera arrangement of one embodiment of the present invention sets is shown.
Figure 11 is the figure of an example of structure of imaging apparatus that the camera arrangement of one embodiment of the present invention is shown.
Figure 12 is the process flow diagram that AF that the camera arrangement of one embodiment of the present invention is shown processes an example.
Figure 13 is the figure of an example that the camera arrangement AF action of one embodiment of the present invention is shown.
Symbol description
100 camera arrangements
101 camera bodies
102 camera control circuits
103 imaging apparatuss
104 focal plane shutters
105 demonstration monitors
106 flashlamp
107 release-pushes
108 batteries
121 main body CPU(BCPU)
122 nonvolatile memories (FROM)
123 storeies (RAM)
124 imaging apparatus control circuits
125 image processing circuits
126 shutter control circuits
127 display circuits
128 flash control circuits
129 operating switch testing circuits
130 power circuits
131 main body telecommunication circuits
132 the 1st release-pushes (1R switch)
133 the 2nd release-pushes (2R switch)
135 control programs
201 change camera lens
202 lens control circuits
203 high image planes sensitivity focusing lens groups (high sensitivity lens group)
204 low image planes sensitivity focusing lens groups (muting sensitivity lens group)
205 apertures
206 manual focus focusing rings (MF ring)
221 camera lens CPU(LCPU)
222 FROM
223 RAM
224 high image planes sensitivity focusing lens driving circuits (high sensitivity lens driving circuit)
225 high image planes sensitivity focusing lens position detecting circuits (high sensitivity lens location testing circuit)
226 low image planes sensitivity focusing lens driving circuits (muting sensitivity lens driving circuit)
227 low image planes sensitivity focusing lens position detecting circuits (muting sensitivity lens location testing circuit)
228 aperture driving circuits
229 MF operation detection circuit
231 camera lens telecommunication circuits
235 lens datas
Embodiment
Below, Yi Bian with reference to accompanying drawing, Yi Bian embodiments of the present invention are elaborated.
Fig. 1 is the camera arrangement about one embodiment of the present invention, the block diagram when being arranged on the replacing camera lens on camera body.Camera arrangement 100 is made of camera body 101 and replacing camera lens 201.
Show and consisted of by liquid crystal or organic EL etc. with monitor 105, carry out in photography during standby and show in real time during the dynamic image photography from the live view image of the image of imaging apparatus 103 outputs showing (so-called live view), perhaps according to the cameraman to the operation of not shown reproduction button and various setting operation parts and display reproduction image and set information etc.
Release-push 107 is for by being operated by the cameraman, thereby make, the functional unit that the camera arrangement of changing camera lens 201 is carried out the photography actions such as AE, AF, exposure has been installed on camera body 101.
On the other hand, replacing camera lens 201 constitutes and comprises: lens control circuit 202, high image planes sensitivity focusing lens group 203(the 1st focusing lens group, hereinafter referred to as the high sensitivity lens group), low image planes sensitivity focusing lens group 204(the 2nd focusing lens group, hereinafter referred to as the muting sensitivity lens group), aperture 205 and manual focus ring (below, be called the MF ring) 206 etc.
In addition, image planes sensitivity represents the amount of movement of focusing lens group and the inverse of the ratio of the amount of movement of corresponding image planes therewith, and is higher with respect to the larger image planes sensitivity of image planes amount of movement of the unit amount of movement of focusing lens group.Therefore, high sensitivity lens group 203 has the 1st image planes amount of movement with respect to the unit amount of movement, and muting sensitivity lens group 204 has the 2nd image planes amount of movement with respect to the unit amount of movement, and the 2nd image planes amount of movement is than the 1st little numerical value of image planes amount of movement.
High sensitivity lens group 203 is driven by the indication of lens control circuit 202, moves in the moving range corresponding with the group shot shadow distance range of optical axis direction and regulates the focus condition of changing camera lens 201.
Muting sensitivity lens group 204 is driven by the indication of lens control circuit 202, moves in the preset range of optical axis direction centered by the precalculated position and the focus condition of changing camera lens 201 is regulated.
With reference to Fig. 2, the electrical structure of the camera arrangement 100 of present embodiment as above is described.Fig. 2 is the block diagram of an example of electrical structure that the camera arrangement of present embodiment is shown, and illustrates camera control circuit 102 shown in Figure 1 and lens control circuit 202 are expanded into respectively electrical module.
The inside of camera body 101 constitute comprise be responsible for all control of camera arrangement 100 main body CPU121(hereinafter referred to as BCPU).On BCPU 121, be connected with for the main body telecommunication circuit 131 that communicates with camera lens CPU 221 by telecommunication circuit 231 described later, the nonvolatile memory 122(FROM such as flash rom of control program 135 etc. that store BCPU 121), temporarily store the storeies such as RAM 123 of the various information of BCPU 121.
In the situation that present embodiment, by by BCPU 121 executive control programs 135, thereby realize illustrative control action in each process flow diagram described later.
And, be connected with imaging apparatus control circuit 124 and image processing circuit 125 on BCPU 121, this imaging apparatus control circuit 124 is controlled imaging apparatus 103 in order to obtain view data, this image processing circuit 125 carries out implementing from the picture signal of imaging apparatus 103 output that the images such as A/D conversion and filtering processing are processed and it being stored as view data generation of photographs and processing image data extraction in the focus detection zone by high-pass filtering to go out radio-frequency component and calculate AF(and automatically focus) processing of evaluation of estimate etc.The AF evaluation of estimate means the evaluation of estimate to focal power suitable with the contrast of shot object image.
And, be connected with shutter control circuit 126 that focal plane shutter 104 is controlled on BCPU 121, be used for the image that will photograph and various photographic information be presented at the operating switch testing circuit 129 that shows the flash control circuit 128 controlled with the display circuit 127 on monitor 105, to flashlamp 106, various operating switch states are detected, for the smoothing of the voltage of the battery 108 that carries out loading with boost etc. and to the power circuit 130 of camera arrangement 100 supply powers.
Be connected with the various operating switchs of the camera body 101 that the cameraman operates on operating switch testing circuit 129, the release-push that moves such as the not shown change-over switch that is connected with the photograph mode that switches camera arrangement 100 with by the operation of release-push 107 etc.
Release-push in present embodiment is made of 2 general stage switches, and BCPU 121 carries out the action control corresponding with the state that passes through operating switch testing circuit 129 detected each switches.When below the 1st release-push 132(, being called the 1R switch by partly pressing of release-push) carry out focus detection and photometry when becoming on-state, change the focusing lens 202,203 driven and become focusing state of camera lens 201.And, when below the 2nd release-push 133(, being called the 2R switch by entirely pressing of release-push) when connecting, focal plane shutter 104 is driven and expose.
The inside of changing camera lens 201 constitutes to comprise is responsible for changing the camera lens CPU 221(of the control in camera lens 201 hereinafter referred to as LCPU).
be connected with FROM 222 on LCPU 221, RAM 223, high image planes sensitivity focusing lens driving circuit (below, be called high sensitivity lens driving circuit) 224, high image planes sensitivity focusing lens position detecting circuit (below, be called high sensitivity lens location testing circuit) 225, low image planes sensitivity focusing lens driving circuit (below, be called muting sensitivity lens driving circuit) 226, low image planes sensitivity focusing lens position detecting circuit (below, be called muting sensitivity lens location testing circuit) 227, aperture driving circuit 228, MF operation detection circuit 229 and camera lens telecommunication circuit 231 etc.
High sensitivity lens driving circuit 224 constitutes actuators such as comprising stepper motor and motor driver etc., drives high sensitivity lens group 203 on optical axis direction.
High sensitivity lens location testing circuit 225 constitutes and comprises optical chopper (PI) circuit etc., the driving that this optical chopper (PI) circuit will be included in high sensitivity lens driving circuit 224 is converted to umber of pulse with the rotation amount of motor, utilizes the umber of pulse of the reference positions such as the unlimited end of distance to represent the absolute position of high sensitivity lens group 203.High sensitivity lens location testing circuit 225 carries out the position probing of driven high sensitivity lens group 203 by high sensitivity lens driving circuit 224.
Muting sensitivity lens driving circuit 226 constitutes actuators such as comprising stepper motor and motor driver etc., drives muting sensitivity lens group 204 on optical axis direction.
Muting sensitivity lens location testing circuit 227 constitutes and comprises PI circuit etc., the driving that this PI circuit will be included in muting sensitivity lens driving circuit 226 is converted to umber of pulse with the rotation amount of motor, utilizes the absolute position that represents muting sensitivity lens group 204 apart from the umber of pulse of the reference positions such as movable range end.Muting sensitivity lens location testing circuit 227 carries out the position probing of driven muting sensitivity lens group 204 by muting sensitivity lens driving circuit 226.
Camera lens telecommunication circuit 231 has the communication connection terminal that is located at replacing camera lens 201 outsides, reception sends lens location information, operating state, lens data etc. from the focusing lens group 203 of BCPU121,204 and the driving order of aperture 205 etc. to BCPU 121.
Fig. 3 is the process flow diagram that the processing of BCPU 121 is shown.
When the power connection of camera body 101, BCPU 121 begins to process from step S101.
In step S101, BCPU 121 judges whether to be equipped with replacing camera lens 201 by detecting not shown installation on off state, in uninstalled situation, carries out regular installation and measuring and waits for motor-driven work until install.In standby, when the alter operation that has been carried out photographic parameter by the cameraman and the in the past reproduction operation etc. of the image of photography, carry out indicated action.When the installation of changing camera lens 201 being detected in step S101, BCPU 121 enters into step S102.
In step S102, BCPU 121 communicates with LCPU221 by main body telecommunication circuit 131, camera lens telecommunication circuit 231, obtains the lens datas such as optical data 235 such as focusing lens group 203,204 etc. action parameter, chromatic aberation data and is stored in RAM123.
In step S103, BCPU 121 begins synchronous communication by main body telecommunication circuit 131, camera lens telecommunication circuit 231 with LCPU221 and transfers to the synchronous communication pattern, afterwards, obtain the camera lens status data and carry out the control action corresponding with the camera lens state in each synchronizing cycle.In addition, will narrate in the back for the details of synchronous communication.
In step S104, BCPU 121 makes imaging apparatus 103 actions obtain view data by imaging apparatus control circuit 124 in each synchronizing cycle.And, by the indication of BCPU 121, in image processing circuit 125, the view data of obtaining is implemented the image processing that the live view image shows use, showing by display circuit 127 demonstration of using beginning live view image on monitor 105.
In step S105, BCPU 121 detects by the confirmation of the camera lens status data that utilizes synchronous communication and obtain and not shown installation on off state, and whether the detection of changing camera lens 201 is installed.And, when having taken off replacing camera lens 201, get back to step S101, enter into step S106 when having installed.
In step S106, whether BCPU 121 detects power supply and is switched on reference to the not shown power switch of camera body 101.And, when disconnecting, power supply enters into step S107, enter into step S108 when connecting.
In step S107, the predetermined end process such as cut-out processing of the preservation of the BCPU 121 various data of execution, homing action, power-supply system.
In step S108, BCPU 121 judges that focal modes is MF pattern or AF pattern, enters into step S109 when the MF pattern, enters into step S111 when the AF pattern.
In step S109, BCPU 121 carries out setting processing for the MF Operational Figure Of Merit of the Operational Figure Of Merit of setting MF ring 206, sets the sensitivity with the MF operational correspondence.Set the details of processing about the MF Operational Figure Of Merit, will narrate in the back.
In step S110, BCPU 121 indicates the setting of MF patterns to LCPU 221 by synchronous communication, and the appointment sensitivity corresponding with the result of the MF Operational Figure Of Merit setting of step S109 is set.When having indicated the setting of MF pattern, also can the omission pattern set indication.
In step S111, BCPU 121 is by the setting of synchronous communication to LCPU 221 indication AF patterns.When having indicated the setting of AF pattern, also can the omission pattern set indication.
In step S112, BCPU 121 detects 1R switch 132 by operating switch testing circuit 129 and whether is in on-state.And, when being in on-state, 1R switch 132 enters into step S113 detecting, get back to step S105 when being in off-state.In addition, the action of the MF during the MF pattern be from above-mentioned steps S105 through step S108(Y) and to step S112(N) cycle for the treatment of carry out.
In step S113, BCPU 121 judges that focal modes is MF pattern or AF pattern.And, enter into step S114 when the AF pattern, enter into step S115 when the MF pattern.
In step S114, Yi Bian communicating with LCPU 221, BCPU 121 carries out the AF action on one side.AF action is carried out the position of the radio-frequency component maximum that will extract as the action of mountain-climbing AF mode focusing position, so-called from the view data of photographing.Perhaps, carry out the action of phase differential AF mode, calculate the many defocus amount that AF is obtained with the phase deviation of the output of pixel according to the subject light beam that is arranged on different pupil location on imaging apparatus 103, that receive process replacing camera lens 201, according to the defocus amount of calculating, focusing lens 203 are driven control.
In step S115, Yi Bian BCPU 121 communicates with LCPU 221 the photometry action of carrying out still image photography use on one side.As photometry action, obtain the computing that exposes of brightness value in picture and Luminance Distribution according to the output of imaging apparatus 103.In addition, when BCPU 121 is the AF pattern in focal modes, carry out concurrently above-mentioned photometry action with the AF action of step S114.
In step S116, whether BCPU 121 is in off-state according to the testing result Lai Pan Do 1R switch 132 of operating switch testing circuit 129.And, enter into step S120 when becoming off-state for 1R switch 132 differentiating, enter into step S117 when being on-state differentiating.
In step S117, whether BCPU 121 differentiates 2R switch 133 according to the testing result of operating switch testing circuit 129 becomes on-state.And, enter into step S118 when being in on-state for 2R switch 133 differentiating, get back to step S116 when being off-state differentiating.
In step S118, BCPU 121 action of making a video recording.The exposure operation result that at first BCPU 121 moves according to the photometry of step S115 communicates with LCPU 221, and the aperture of indication aperture 205 dwindles action.And, complete after aperture dwindles action, BCPU 121 by control imaging apparatus 103 for the indication of imaging apparatus control circuit 124, shutter control circuit 126, focal plane shutter 104 is carried out the shooting action.And BCPU 121 indicating image treatment circuits 125 will be converted to view data from the image pickup signal of imaging apparatus 103 outputs.
In step S119, the view data that BCPU 121 will obtain in step S118 stores the foreign mediums such as RAM123 or compact flash into.In addition, make by display circuit 127 demonstration that shows with monitor 105 execution photographss simultaneously.
In step S120, BCPU 121 carries out the initialization of focus marks and the removing of photographs demonstration etc. by display circuit 127, thereby will show that the display setting with monitor 105 is after the live view image shows, and get back to step S105 and transfer to the photography holding state.
Fig. 4 is the process flow diagram of an example that the processing of the LCPU 221 in the replacing camera lens 201 of one embodiment of the present invention is shown.
In step S201, when the power connection of camera body 101, when supplying with changing camera lens 201 beginning power supplys by not shown installation power supply contact, LCPU 221 carries out focusing lens group 203,204 and the initial settings such as the homing action action of aperture 205.
In step S202, LCPU 221 communicates with BCPU 121 by camera body telecommunication circuit 131, camera lens telecommunication circuit 231.And, according to the request of BCPU 121, the lens data 235 that is stored in optical datas such as focusing lens group 203 in FROM 222,204 etc. action parameter, chromatic aberation data etc. is sent to BCPU 121.
In step S203, LCPU 221 begins to carry out synchronous communication by main body telecommunication circuit 131, camera lens telecommunication circuit 231 with BCPU121 and transfers to the synchronous communication pattern.Afterwards, the camera lens status data in being stored in RAM 223 each synchronizing cycle sends to BCPU 121.In addition, about synchronous communication in detail, will narrate in the back.
In step S204, the MF operation when being carried out the operation of release-push 107 of camera body 101 and MF pattern by the cameraman determines whether that from BCPU 121 to LCPU 221 have carried out carrying out the indication of the driving of focusing lens group 203,204.LCPU 121 enters into step S205 when being judged to be the indication of having carried out the driving execution, enter into step S206 when being judged to be the indication that does not drive execution.
In step S205, LCPU 221 is according to carry out the driving control that high sensitivity lens group 203, muting sensitivity lens group 204 are carried out in indication from the driving of BCPU 121.At this moment, LCPU 221 is by high sensitivity lens driving circuit 224, muting sensitivity lens driving circuit 226, high sensitivity lens location testing circuit 225, muting sensitivity lens location testing circuit 227, carries out focusing lens group 203,204 driving is controlled.In addition, about the lens driving carried out in step S205 process in detail, will narrate in the back.
In step S206, whether LCPU 221 differentiates focal modes according to the information of synchronous communication is the AF pattern, enters into step S212 when being the AF pattern, enters into step S207 when not being the AF pattern.
In step S207, LCPU 221 determines whether the operation of having carried out MF ring 206 by MF operation detection circuit 229.The detection of the operation of MF ring 206 be for example by differentiate by MF operation detection circuit 229 the position of rotation of the MF ring 206 that each operation detection regularly detects whether with respect on once the detection position occured to change and carried out.
In addition, in order to carry out focusing lens group 203 described later, 204 driving, also obtain sense of rotation and the location variation (rotation amount) of MF ring 206 this moment and store.
In step S208, LCPU 221 enters into step S209 when the operation of having carried out MF ring 206 being detected by step S207, enter into step S212 when not detecting.
In step S209, whether LCPU 221 differentiates by synchronous communication is muting sensitivity from the Operational Figure Of Merit of the MF ring 206 of BCPU 121 indications, enters into step S210 when muting sensitivity, enters into step S211 when high sensitivity.
In step S210, LCPU 221 carries out the driving of muting sensitivity lens group 204 by muting sensitivity lens driving circuit 226, muting sensitivity lens location testing circuit 227 according to the sense of rotation that detects and rotation amount in step S207.
In step S211, LCPU 221 carries out the driving of high sensitivity lens group 203 by high sensitivity lens driving circuit 224, high sensitivity lens location testing circuit 225 according to the sense of rotation that detects and rotation amount in step S207.
In step S212, LCPU 221 is confirmed whether to have received from BCPU 121 and stops from camera body 101 to the indication of changing camera lens 201 supply powers, enter into step S213 when having received the indication that stops the power supply supply, get back to step S204 when not receiving.
Herein, when focal modes is set to the MF pattern, from step S204(N) through step S206(N), enter into step S210 or step S211 carries out MF action (lens driving) from step S207.And, from step S212(N) and enter into step S204, repeatedly carry out this cycle for the treatment of.
In addition, when focal modes is set to the AF pattern, execution in step S204(Y repeatedly), S205, S206(Y), S212(N) cycle for the treatment of, carry out AF action (lens driving) by step S205.
In step S213, LCPU 221 carries out focusing lens group 203,204 and the end process such as current location storage of aperture 205, homing action as required.
Fig. 5 is the sequential chart of an example that the synchronous communication of the replacing camera lens 201 of one embodiment of the present invention and camera body 101 is shown, and according to Fig. 5, the synchronous communication of BCPU 121 and LCPU 221 is described.
In synchronous communication, except the instruction of communication use, BCPU 121 with predetermined period, for example with identical cycle of vertical synchronizing signal (b) of shooting use, with the synchronizing signal of camera lens communication use, be that camera lens communication synchronization signal (e) sends to LCPU 221.
In addition, BCPU 121 sends to LCPU 221 lens location that the timing of obtaining focusing lens group 203,204 positional information is indicated and obtains signal (f).
Process LI(g in changing camera lens) in, the mode of operation that the obtaining of focusing lens group 203,204 positional information, MF ring 206 are carried out in the timing of obtaining the state variation of signal (f) at lens location detects and the focusing lens group 203 corresponding with detected mode of operation, 204 driving etc.
Treatments B 1(a in camera body) in, utilize the view data of obtaining in previous frame to carry out the demonstration of live view image and the calculating of AF evaluation of estimate etc.
BL shown in camera lens communication (d) is the camera lens status data request instruction that sends to the camera lens status data of LCPU 221 from BCPU 121 be used to obtaining.
Process L2(g in changing camera lens) in, LCPU 221 is according to the camera lens status data request instruction BL(d that receives from BCPU 121) request, with focusing lens group 203,204 positional information and the camera lens status data LB(d such as mode of operation of MF ring 206) send to BCPU 121.
Treatments B 2(a in camera body) in, according to the camera lens status data LB(d that obtains by the camera lens state communication), near the judgement focusing when carrying out AF computing, MF pattern, various setting changes etc.A series of communication operation described above is synchronizeed with camera lens communication synchronization signal (e) and is repeatedly carried out.
Fig. 6 is the process flow diagram that the processing of the subroutine " setting of MF Operational Figure Of Merit " of being carried out by BCPU 121 is shown.According to Fig. 6, the concrete example of the processing of " setting of MF Operational Figure Of Merit " shown in the step S109 of Fig. 3 is described.
In the processing of " setting of MF Operational Figure Of Merit ", BCPU 121 is according to the variation of the AF evaluation of estimate of being obtained by the view data of obtaining in each frame, and whether the position of carrying out high sensitivity lens group 203 is positioned near the judgement of focusing position.And, select high sensitivity lens group 203 and any one party in muting sensitivity lens group 204 to carry out MF action (lens driving) according to result of determination.
In step S131, BCPU 121 indicating image treatment circuits 125 carry out the calculating of AF evaluation of estimate according to the view data of obtaining, and obtain the AF evaluation of estimate.
In step S132, BCPU 121 detects the maximum value of AF evaluation of estimate according to expression maximum value detects sign and differentiates and maximum value whether detected.And BCPU 121 enters into step S133 when maximum value not detected, enter into step S139 when maximum value being detected.In addition, maximum value detects when sign is installed on camera body 101 with replacing camera lens 201 when the power connection of camera body 101 and is eliminated.
In step S133, BCPU 121 differentiates whether the AF evaluation of estimate of obtaining is maximum value.BCPU 121 according to the positional information of the AF evaluation of estimate of obtaining with time series and high sensitivity lens group 203 this to data, whether the AF evaluation of estimate that differentiation is obtained is maximum value.And BCPU 121 enters into step S134 when being maximum value differentiating.
In step S134, BCPU 121 is set as maximal value D1 with the maximum value that detects, and maximum value is detected sign arrange.In step S135, the decision content D2 that set basis maximal value D1 calculates with predetermined relationship.In addition, in step S133, BCPU 121 enters into step S138 when being not maximum value differentiating.
Use Fig. 7 that the relation between the position of the relation of AF evaluation of estimate and maximal value D1, decision content D2 and AF evaluation of estimate and focusing lens group is described herein.
In Fig. 7, D1 is focusing lens group 203,204 the position AF evaluation of estimate (maximal value of AF evaluation of estimate) when being focusing position, Dj is to be near judgement scope near the focusing position of the scope focusing position with focusing lens group 203,204 location determination for regulation, and D2 represents near decision content near judge the value after scope Dj the maximal value D1 of AF evaluation of estimate deducts focusing position focusing position.
In addition, LP1 illustrates the lens location that becomes focusing when regarding focusing lens group 203,204 as a lens group, near the lens location when LP2 represents the AF evaluation of estimate is become that the focusing lens group 203,204 of decision content D2 is regarded a lens group as focusing position.
Then, get back to the process flow diagram of processing of Fig. 6 " setting of MF Operational Figure Of Merit ", proceed explanation.
In step S136, BCPU 121 compares AF evaluation of estimate and the decision content D2 that obtains, and is judged to be than decision content D2 hour in the AF evaluation of estimate be not included in the focusing position environs and enter into step S137.On the other hand, BCPU 121 is decision content D2 when above in the AF evaluation of estimate, is judged to be included in the focusing position environs and enter into step S142.
In step S137, because being judged to be, BCPU 121 is not near focusing position, therefore the value of maximal value D1 is removed, and maximum value is detected sign remove.
As mentioned above, less and be judged to be when not being near focusing position than near the decision content D2 focusing position in the AF evaluation of estimate in MF action, the value of maximal value D1 is removed.Afterwards, in step S133, when the maximum value of AF evaluation of estimate again being detected, this maximum value is set as new maximal value D1.
In step S138, BCPU 121 will encircle the focusing lens group that 206 operation drives by MF and be set as high sensitivity lens group 203.
In step S142, BCPU 121 will encircle the focusing lens group that 206 operation drives by MF and be set as muting sensitivity lens group 204.
On the other hand, BCPU 121 detects sign to maximum value and arranges in step S132, is differentiating when maximum value being detected, and in step S139, whether differentiation AF evaluation of estimate is greater than the maximal value D1 that has set.
In step S139, BCPU 121 enters into step S136 when being judged to be the AF evaluation of estimate not greater than maximal value D1, take a decision as to whether near focusing position.
On the other hand, BCPU 121 enters into step S140 when being judged to be the AF evaluation of estimate greater than maximal value D1, in step S140, up-to-date AF evaluation of estimate is updated to maximal value D1.
And in step S141, BCPU 121 upgrades near the decision content D2 of focusing position according to the maximal value D1 that has upgraded.As mentioned above, continue the detection of the maximal value D1 of execution AF evaluation of estimate in the MF pattern, be judged to be focusing lens group 203,204 position be near focusing position during, upgrade near decision content D2 maximal value D1 and focusing position when new maximal value being detected at every turn.
And BCPU 121 is that peaked situation is thought near scope focusing position of being positioned at according to the AF evaluation of estimate, thereby enters into step S142.And in step S142, BCPU 121 will encircle the focusing lens group that 206 operation drives by MF and be set as muting sensitivity lens group 204.
Then, according to Fig. 7, the action of the process flow diagram of processing based on " setting of MF Operational Figure Of Merit " shown in Figure 6 and the example of MF action that comprises cameraman's operation are described.
When the MF pattern, the cameraman should move to focus by MF, carries out MF ring 206 being rotated the 1st rotary manipulation of operation to the direction of focusing position.
LD1 represents the MF action to the focusing position direction based on above-mentioned the 1st rotary manipulation, therefore for example represents the drive actions of high sensitivity lens group 203.At this moment, illustrate and make high sensitivity lens group 203 from as the closely direction of the side action of moving of the unlimited side direction of the direction of focusing position.And when proceeding the MF action, high sensitivity lens group 203 moved focusing position LP1, became the action that the AF evaluation of estimate surpasses maximal value D1.
The cameraman observes with monitor 105 showing, the situation that makes the contrast that shows image surpass peak value by the 1st rotary manipulation according to MF ring 206 identifies and moves focusing position, then carries out MF ring 206 the 2nd rotary manipulations to opposite spin.
As shown in Figure 7, the position of the focusing lens group before this counter-rotating action is between LP1 and LP2, and corresponding AF evaluation of estimate is included near the judgement scope Dj of focusing position therewith.Therefore, be judged to be near focusing position in the step S136 of MF Operational Figure Of Merit determination processing shown in Figure 6.So BCPU121 carries out muting sensitivity and sets in step S142, will encircle the focusing lens group that 206 rotary manipulation drives by MF is muting sensitivity lens group 204 from high sensitivity lens group 203 change settings.
LD2 represents according to above-mentioned the 2nd rotary manipulation, the action that muting sensitivity lens group 204 is moved from the unlimited side direction of side direction closely.And when further proceeding the MF action, muting sensitivity lens group 204 moved focusing position LP1, became the action that the AF evaluation of estimate surpasses maximal value D1.
The cameraman observes with the live view image on monitor 105 being presented at demonstration, according to the 2nd rotary manipulation of MF ring 206, the contrast that shows the demonstration image of using monitor 105 is surpassed peak value again, moves the situation of focusing position and identifies.And the cameraman carries out to MF ring 206 being rotated the 3rd rotary manipulation of operation in the other direction.
LD3 represents according to above-mentioned the 3rd rotary manipulation, make muting sensitivity lens group 204 from unlimited side direction closely the direction of side move and arrive the action of focusing position LP1.As shown in Figure 7, the AF evaluation of estimate corresponding with the position of this counter-rotating action (LD3) focus lens group before is included near the judgement scope Dj of focusing position, is judged to be near focusing position.Therefore, BCPU 121 carries out muting sensitivities and sets in step S142, and the focusing lens group of encircle 206 rotary manipulation driving by MF is kept muting sensitivity lens group 204 and do not changed.
As mentioned above, when MF moves, judge that whether the focusing lens group is positioned near focusing position, utilizes the focusing of muting sensitivity lens group 204 in the time of near being positioned at focusing position.Thus, due to the image planes amount of movement that can reduce with respect to the operational ton of MF ring 206, therefore can further improve focusing accuracy, and the operability can further improve focusing and finely tune the time.
Fig. 8 is the process flow diagram that " AF " that carry out in the step S114 of Fig. 3 processes.When adopting mountain-climbing AF mode as the AF mode, to be extracted as the AF evaluation of estimate from the radio-frequency component of the picture signal of imaging apparatus 103 output by image processing circuit 125, carry out the position that this AF evaluation of estimate becomes the focusing lens group of maximum value is made as the control of focusing position.
In step S150, BCPU 121 and LCPU 221 carry out synchronous communication, indicate mobile high sensitivity lens group 203 in the AF action and the high sensitivity setting of the action of focusing.
In step S151, BCPU 121 and LCPU 221 carry out synchronous communication, and indication makes the beginning of the scanning motion that the focusing lens group moves.In addition, scanning motion is to carry out by LCPU 221 in the step S205 of Fig. 4.
In step S152, BCPU 121 obtains the AF evaluation of estimate of calculating by image processing part 125 and stores according to the picture signal of being exported by imaging apparatus 103 shootings.
In step S153, BCPU 121 judges according to the AF evaluation of estimate of storing, many to data with the position data of the focusing lens group of being obtained by synchronous communication by LCPU 221 corresponding to the AF evaluation of estimate whether the AF evaluation of estimate has surpassed maximum value.And BCPU 121 enters into step S154 when having surpassed maximum value, enters into step S159 when not surpassing maximum value.
In step S154, BCPU 121 and LCPU 221 carry out synchronous communication, and what beacon scanning moved stops.
On the other hand, in step S159, BCPU 121 and LCPU 221 carry out synchronous communication, obtain the information whether the focusing lens group reaches mobile boundary.And, enter into step S160 when reaching mobile boundary, carrying out can not Check processing and finish AF and process.
In addition, get back to step S152 when not reaching mobile boundary, repeatedly carry out the obtaining until surpass maximum value of AF evaluation of estimate in scanning motion.
In step S155, BCPU 121 calculates the focusing position corresponding with the genuine maximum value of AF evaluation of estimate by based on the AF evaluation of estimate before and after the maximum value of AF evaluation of estimate and the interpolation processing etc. of the position data of the focusing lens group of correspondence therewith.
In step S156, BCPU 121 and LCPU 221 communicate, and indication drives high sensitivity lens group 203 to focusing position.At this moment, as described later high sensitivity lens group 203 is driven into from the position of focusing position to the front lateral deviation from scheduled volume.In addition, the focusing position drive actions is to carry out by LCPU 221 in the step S205 of Fig. 4.
In step S157, BCPU 121 and LCPU 221 communicate, and indication is carried out the muting sensitivity of the focusing action of mobile muting sensitivity lens group 204 and set in the AF action.
In step S158, BCPU 121 and LCPU 221 communicate, and again indicate muting sensitivity lens group 204 is moved and finishes AF and process to focusing position.
The movement of the focusing lens group in processing about the AF that carries out as mentioned above further describes according to Fig. 9.
Fig. 9 is the figure that the variation (b) of the image planes position that causes by the variation (a) of the image planes position that X direction is caused as the movement of the high sensitivity lens group 203 of image planes positions with by the movement of muting sensitivity lens group 204 is shown.
In Fig. 9, when having been undertaken by 121 couples of LCPU of BCPU 221 carrying out indication for detection of the driving of turntable driving that the AF evaluation of estimate becomes the focusing position LP1 of maximum value (step S151), 221 pairs of high sensitivity lens group 203 of LCPU drive (LDs).Herein, Ps illustrates the driving resolution of high sensitivity lens group 203.
And, the maximum value (step S153:Y) of AF evaluation of estimate when having surpassed focusing position LP1, the position of high sensitivity lens group 203 detected, stop turntable driving (step S154) on the position of LP3.And BCPU121 detects focusing position LP1(step S155 according to the AF evaluation of estimate).The driving (step S156) that BCPU 121 indication LCPU 221 carry out to the focusing position LP1 that detects, LCPU 221 with high sensitivity lens group 203 from the position of LP3 to indicated position.
Yet, as shown in Figure 9, driving due to the relation of the driving resolution Ps of high sensitivity lens group 203 when having produced skew in stop position and focusing position, be driven into the stop position LPc(LDo of the front of the most approaching focusing position corresponding with driving resolution Ps: step S156).
And, muting sensitivity lens group 204 is driven the driving stop position LPc of high sensitivity lens group 203 and the difference component (LDw: step S158) between focusing position LP1.Pw represents the driving resolution of muting sensitivity lens group 204.About the image planes amount of movement of muting sensitivity lens group 204, therefore relevant with the amount of movement of the identical lens group of optical axis direction because image planes sensitivity is lower, also less than the image planes amount of movement of high sensitivity lens group 203.Therefore, resolution Pw represents the value less than resolution Ps.
As mentioned above, proofread and correct for the error that the driving resolution Ps by high sensitivity lens group 203 is caused, the correction of carrying out muting sensitivity lens group 204 drives (LDw), can carry out more high-precision focusing.
In addition, about focusing lens group 203,204 to the driving of focusing position order, although adopt successively order, can be also the while.By carrying out simultaneously, thereby can shorten the driving time of focusing lens group, can the microfilming time-delay.
In addition, in the above description, about the margin of error that the driving resolution by high sensitivity lens group 203 causes, carry out the driving of muting sensitivity lens group 204 and proofread and correct.But, also can be applied to the error that causes by other factors, such as the spatial frequency characteristic by photographic optical system and proofread and correct by comprising error that camera body 101 causes in interior mechanical deflection etc.Specifically as shown below.The error that will be caused by the spatial frequency characteristic of photographic optical system and by comprising error that camera body 101 causes in interior mechanical deflection etc., pre-stored to camera body 101 with change in the FROM 122,222 of camera lens 201.And, also can carry out the driving of muting sensitivity lens group 204 according to the driving amount of the error information of being obtained each factor by BCPU 121 or LCPU 221 and whole margins of error of calculating, thereby above-mentioned error is proofreaied and correct.
As mentioned above, by the driving amount drives with being muting sensitivity lens group 204 with the relevant slight error composition conversion of focusing, carry out high-precision focusing action thereby can remove this error percentage.
As described above, the camera arrangement of the 1st embodiment of the present invention can carry out with good operability near the fine adjustment of the focus focusing position when MF, and the driving that can carry out high-precision focus lens when AF is controlled.
In addition, although the 1st embodiment of the present invention is depicted as the camera arrangement that consists of by changing camera lens and camera body, also can be applied to the one-piece type camera of camera lens that phtographic lens and camera body is constituted one.
Figure 10 is the process flow diagram that the processing of the BCPU 121 in the camera arrangement of the 2nd embodiment of the present invention is shown.
About the 2nd embodiment, omit about with the explanation of the 1st embodiment same section, only different parts is described.According to Figure 10, the processing of " setting of MF Operational Figure Of Merit " corresponding with Fig. 4 of the 1st embodiment is described.
In step S161, BCPU 121 enters into step S167 when the demonstration of camera body 101 is exaggerated demonstration with the demonstration of the live view image on monitor 105, enter into step S162 when usually showing.Can be by the cameraman the common demonstration of manually carrying out the live view image such as the push-botton operation by camera body 101 with amplify the switching that shows.In addition, also can be when the operation of MF ring 206 being detected and at step S136(Fig. 6) in be judged to be near focusing position moment, automatically amplify demonstration by BCPU 121.
In step S162, BCPU 121 judges whether photograph mode is macro mode, enters into step S167 when being macro mode, enters into step S163 when being in addition pattern.About the setting of macro mode, can set by the model selection menu of camera body 101.In addition, also can detect the operation that the MF ring 206 of changing camera lenses 201 and macro mode are set button etc. by LCPU 221, its information is sent to BCPU 121 as the camera lens status data, set macro mode by BCPU 121.
In step S163, BCPU 121 judges whether current photography multiplying power is larger than predetermined photography multiplying power, enters into step S167 when larger than predetermined photography multiplying power, hour is entering into step S164 than predetermined photography multiplying power.About the judgement of size of photography multiplying power, carry out in such a way.For example, by synchronous communication from the focal length data changing camera lens 201 and obtain the subject range data corresponding with the position of current focusing lens and change camera lens 201 as the camera lens status data, calculate the photography multiplying power by their ratio.And, judge the photography multiplying power obtain whether than predetermined photography multiplying power, for example 1/30 times large.
In addition, camera lens CPU 221 also can calculate the photography multiplying power according to subject range data and the focal length data corresponding with the position of current focusing lens, and the multiplying power data of should photographing send to BCPU 121 by synchronous communication as the camera lens status data.
In step S164, whether the F value that BCPU 121 differentiates current replacing camera lens is less than predetermined value, hour entering into step S167 than predetermined value, enters into step S165 when larger than predetermined value.
In step S165, BCPU 121 judges whether focal modes is the AF+MF pattern, enters into step S167 when being the AF+MF pattern, enters into step S166 when pattern in addition.The AF+MF pattern is after execution AF moves and focuses, permission and the cameraman focal modes to manual focus action corresponding to the rotary manipulation of MF ring 206.It is the focal modes of using when utilizing AF action to carry out the focal position being changed a little the state of focusing the cameraman.
In step S166, BCPU 121 will encircle the focusing lens group that 206 operation drives by MF and be set as high sensitivity lens group 203.
In step S167, BCPU 121 will encircle the focusing lens group that 206 operation drives by MF and be set as muting sensitivity lens group 204.
As described above, in the camera arrangement of the 2nd embodiment of the present invention, when the MF pattern, in the situation that the camera state of the more high-precision focusing of expectation is selected the focusing of the operational correspondence of 204 execution of muting sensitivity lens group and MF ring 206.
The situation of the photograph mode (pattern) that the common photograph mode of permission depth ratio that the camera state of the more high-precision focusing of expectation is for example focused is little.Thus, owing to can converting to carry out by image planes the position control of high-resolution focusing lens group, therefore can carry out more high-precision manual focus action.The situation of the camera state of the more high-precision focusing of expectation specifically, is to show that the live view image with monitor 105 shows that the situation that is exaggerated demonstration, situation, photography multiplying power situation, F value than predetermined value little situation, the focal modes larger than predetermined multiplying power that photograph mode is macro mode are the situation of AF+MF pattern.
Then, the variation of the 2nd embodiment of the present invention described.
Also can replace the processing of step S162 and carry out following processing.Changing the not shown mode setting part that has the pattern that to set the replacing camera lens on camera lens 201, be provided with macro mode and set button (not shown).The not shown switch that LCPU 221 reference group install in macro mode setting button detects whether be set with macro mode.And LCPU 221 is when detecting when having set macro mode, and the focusing lens group that also operation that encircles 206 by MF can be driven is set as muting sensitivity lens group 204.
In addition, also can replace the processing of step S163 and carry out following processing.Camera lens CPU 221 calculates the photography multiplying power according to subject range data and the focal length data corresponding with the position of current focusing lens.And camera lens CPU 221 also can be when these multiplying power data of photographing are larger than predetermined value will encircle the focusing lens group that 206 operation drives by MF and be set as muting sensitivity lens group 204.
In addition, also can replace the processing of step S164 and carry out following processing.Camera lens CPU 221 obtains the current F value of changing camera lens.And camera lens CPU 221 also can be in this F value than predetermined value hour, will encircle the focusing lens group that 206 operation drives by MF and be set as muting sensitivity lens group 204.In above variation, also can access the effect identical with the 2nd embodiment of the present invention.
Other variation of the 2nd embodiment of the present invention below are shown in addition.In this variation, 221 send the data that represent pattern from BCPU121 to LCPU, LCPU 221 differentiates patterns, and will encircle focusing lens group selection that 206 operation drives by MF is any one party in high sensitivity lens group 203 and muting sensitivity lens group 204.
For example, also can replace step S161, S167 and carry out following processing.The demonstration that BCPU 121 will be illustrated in camera body 101 shows it is to amplify the pattern data that show or usually show to send to LCPU 221 with the live view image on monitor 105.And LCPU 221 will encircle the focusing lens group that 206 operation drives by MF and be set as muting sensitivity lens group 204 when showing for amplifying according to the pattern data judging that sends.
In addition, also can replace step S162, S167 and carry out following processing.BCPU 121 determines whether that will set photograph mode by the model selection menu of camera body 101 is set as macro mode, sends to LCPU 221 with these pattern data.LCPU 221 according to the pattern discriminating data that sends when having set macro mode, will encircle the focusing lens group that 206 operation drives by MF and be set as muting sensitivity lens group 204.
In other above variation, also can access the effect identical with the 2nd embodiment of the present invention.
In addition, although the 2nd embodiment of the present invention is depicted as the camera arrangement that consists of by changing camera lens and camera body, also can be applied to phtographic lens and camera body are constituted on the one-piece type camera of camera lens of one.
Then, the 3rd embodiment of the present invention is described.
The 3rd embodiment is with respect to adopting mountain-climbing AF mode as the AF mode in the 1st embodiment, difference is to have adopted phase differential AF mode.About the 3rd embodiment, omit about with the explanation of the 1st embodiment same section, only different parts is described.
At first, according to Figure 11, the structure for the imaging apparatus that carries out phase differential AF mode is described.Figure 11 is the part enlarged diagram of pixel section that is illustrated in an example of the imaging apparatus 103 that uses when carrying out phase differential AF in camera arrangement of the present invention.
Read a plurality of benchmark AF with pixel 303 with reference to the output of AF with pixel 304, calculate phase differential by image processing circuit 125 according to the picture signal that the pixel output by two a plurality of kinds consists of, obtain focusing position according to the phase differential that calculates and focus.
Then, the process flow diagram according to Figure 12 describes " AF " processing of carrying out in the step S114 of Fig. 3.
In step S170, BCPU 121 with pixel 303 with reference to the output of AF with pixel 304, obtains the phase differential that calculates by image processing circuit 125 according to a plurality of benchmark AF.
In step S171, BCPU 121 is according to the phase difference calculating focusing position that obtains.In step S172, BCPU 121 and LCPU 221 carry out synchronous communication, indicate mobile high sensitivity lens group 203 in the AF action and the high sensitivity setting of the action of focusing.
In step S173, BCPU 121 carries out the locational focusing position front driving that high sensitivity lens group 203 is moved to the front of focusing position described later.
In step S174, BCPU 121 and LCPU 221 carry out synchronous communication, indicate mobile muting sensitivity zoom lens group 204 in the AF action and the muting sensitivity setting of the action of focusing.
In step S175, BCPU 121 carries out as described later muting sensitivity lens group 204 is driven to the focusing position that focusing position moves.
Figure 13 is illustrated in phase differential AF mode, the figure of the variation (b) of the image planes position that causes by the variation (a) of the image planes position that X direction is caused as the movement of the high sensitivity lens group 203 of image planes positions with by the movement of muting sensitivity lens group 204.
When having carried out from 121 couples of LCPU of BCPU 221 carrying out indication to the driving of position, the front LPc that does not cross the focusing position that calculates (step S173), LCPU 221 is driven into high sensitivity lens group 203 upper (the LDd: step S205) of position, front LPc of focusing position as indicated.
About the stop position of the driving of high sensitivity lens group 203, owing to having predetermined resolution Ps, therefore produce deviation between stop position and focusing position.Therefore, be driven into and do not cross focusing position, and near the stop position LPc of the front of focusing position.This is because in case when having crossed focusing position, need to drive the focusing lens group to opposite direction, have the problem that produces the recoil error factors and reduce the AF precision.
And, the indication (step S175) that focusing position by BCPU 121 drives, LCPU 221 drives muting sensitivity lens group 204 stop position and the difference between focusing position (LPc-LP1) amount (LDw: step S205) of high sensitivity lens group 203 to the direction of focusing position.Because the resolution of the stop position of muting sensitivity lens group 204 is higher than the resolution of the stop position of high sensitivity lens group 203, therefore can make the focusing lens group be positioned at the position of more close focusing position.
As mentioned above, proofread and correct for the error that the driving resolution by high sensitivity lens group 203 is caused, the correction of carrying out muting sensitivity lens group 204 drives (LDw), can carry out more high-precision focusing.
In addition, about focusing lens group 203, the 204 driving orders to focusing position, although adopt the order of carrying out successively, can be also simultaneously.Thereby by carrying out simultaneously the driving time that can shorten the focusing lens group, can the microfilming time-delay.
In addition, in the above description, about the margin of error that the driving resolution by high sensitivity lens group 203 causes, carry out the driving of muting sensitivity lens group 204.But, the error that also can be applied to other factors, causes such as the spatial frequency characteristic by photographic optical system and proofreading and correct by comprising error that the skew of camera body 101 at interior machinery cause etc.Specifically as shown below.The error that will be caused by the spatial frequency characteristic of photographic optical system and pre-stored at camera body 101 with in changing the FROM 122,222 of camera lens 201 by comprising error that the skew of camera body 101 at interior machinery cause etc.And, also can carry out the driving of muting sensitivity lens group 204 according to the driving amount of the error information of being obtained each factor by BCPU 121 or LCPU 221 and whole margins of error of calculating, above-mentioned error is proofreaied and correct.
As described above, according to the 3rd embodiment of the present invention, to proofread and correct for the error that when AF moves, the driving resolution by high sensitivity lens group 203 is caused, the correction of carrying out muting sensitivity lens group 204 drives, and can carry out more high-precision focusing.
As mentioned above, the present invention has the highly sensitive focusing lens group of image planes and the low focusing lens group of image planes sensitivity, be installed under state on camera body will drive according to focusing action replacing camera lens that two focusing lens groups focus, when having carried out manual focus operation by the cameraman, normally drive the highly sensitive focusing lens group of image planes, near focusing position and under the condition of focusing that need to be trickle, drive the low focusing lens group of image planes sensitivity.
In addition, in above-mentioned structure, when the execution indication operation of having been carried out automatic focusing by the cameraman, drive highly sensitive focusing lens group and the low focusing lens group both sides of image planes sensitivity of image planes, and the low focusing lens group of driving image planes sensitivity, the mode of proofreading and correct with the side-play amount apart from focusing position that driving resolution and stop position error by the highly sensitive focusing lens group of image planes are caused, thus can carry out high-precision automatic focusing.
And, when photograph mode is the dynamic image pattern, the highly sensitive focusing lens group of image planes is that to move corresponding tracking driven when driving for detection of the turntable driving of focusing position with image planes that the relative distance of following subject and camera changes carrying out, and the low focusing lens group of image planes sensitivity is carry out waving of small round driving near focusing position in order to detect the subject state variation driven when driving grade.
That is, the camera arrangement of embodiments of the present invention can carry out with good operability near the fine adjustment of the focus focusing position when MF, and the driving that can carry out high-precision focus lens when AF is controlled.
Although embodiments of the present invention are as illustrating by changing the camera arrangement that camera lens and camera body consist of, also can use the present invention on the one-piece type camera of camera lens that phtographic lens and camera body is constituted one.
In addition, the present invention is not limited to illustrative structure in the above-described embodiment, can certainly carry out various changes in the scope that does not break away from its main idea.In addition, about the motion flow in claims, instructions and accompanying drawing, even use " at first ", " following " etc. to be illustrated for convenient, do not mean that yet and sequentially to implement according to this.
Claims (13)
1. change camera lens for one kind, it can be arranged on camera body, and this replacing camera lens has:
The 1st focusing lens group, it has the 1st image planes amount of movement with respect to the unit amount of movement;
The 2nd focusing lens group, it has the 2nd image planes amount of movement less than the 1st image planes amount of movement with respect to the unit amount of movement;
The MF operating portion, it is used for carrying out manual focus;
The lens driving control part, it is when having operated described MF operating portion, select described the 1st focusing lens group or described the 2nd focusing lens group, according to the operation of described MF operating portion, selected described the 1st focusing lens group or described the 2nd focusing lens group are driven control.
2. replacing camera lens according to claim 1, wherein,
Described replacing camera lens has the mode setting part that can set a plurality of patterns,
When described lens driving control part is set to the common little pattern of permission depth ratio in the pattern of being set by described mode setting part, select described the 2nd focusing lens group.
3. camera, it has a plurality of focusing lens groups, and this camera has:
The 1st focusing lens group, it has the 1st image planes amount of movement with respect to the unit amount of movement;
The 2nd focusing lens group, it has the 2nd image planes amount of movement less than the 1st image planes amount of movement with respect to the unit amount of movement;
The MF operating portion, it is used for carrying out manual focus; And
The lens driving control part, it is when having operated described MF operating portion, select described the 1st focusing lens group or described the 2nd focusing lens group, according to the operation of described MF operating portion, selected described the 1st focusing lens group or described the 2nd focusing lens group are driven control.
4. camera according to claim 3, wherein,
Described camera has focus detection section, its detect described a plurality of focusing lens groups to focal power,
Described lens driving control part is by detected described described the 2nd focusing lens group of selecting when focal power is surpassed predetermined decision content of described focus detection section.
5. camera according to claim 4, wherein,
Described predetermined decision content is and is set explicitly by the detected maximum value to focal power of above-mentioned focus detection section.
6. camera according to claim 3, wherein,
Described camera has the mode setting part that can set a plurality of patterns,
When described lens driving control part is set to the common little pattern of permission depth ratio in the pattern of being set by described mode setting part, select described the 2nd focusing lens group.
7. camera arrangement, it is made of the camera body of changing camera lens and this replacing camera lens can being installed,
Described camera body has the camera body control part that can communicate with described replacing camera lens,
Described replacing camera lens has:
The 1st focusing lens group, it has the 1st image planes amount of movement with respect to the unit amount of movement;
The 2nd focusing lens group, it has the 2nd image planes amount of movement less than the 1st image planes amount of movement with respect to the unit amount of movement;
The MF operating portion, it is used for carrying out manual focus;
Department of Communication Force, itself and described camera body communicate;
The lens driving control part, when having operated described MF operating portion under the state that described replacing camera lens is arranged on described camera body, this lens driving control part is by the indication of described Department of Communication Force reception from the camera body control part, indicate to select described the 1st focusing lens group or described the 2nd focusing lens group according to this, according to the operation of described MF operating portion, selected described the 1st focusing lens group or described the 2nd focusing lens group are driven control.
8. camera arrangement according to claim 7, wherein,
Described camera body has focus detection section, this focus detection section detect described the 1st focusing lens group and the 2nd focusing lens group to focal power,
Described camera body control part when focal power is surpassed predetermined decision content, is selected described 2nd focusing lens group by the described lens driving control part of described Department of Communication Force indication described.
9. camera arrangement according to claim 7, wherein,
Described camera body has focus detection section, this focus detection section detect described the 1st focusing lens group and the 2nd focusing lens group to focal power,
Described camera body control part will send to described lens driving control part to the relevant data of focal power with described by described Department of Communication Force, and described lens driving control part is selected described the 2nd focusing lens group when focal power is surpassed predetermined decision content described.
10. according to claim 8 or 9 described camera arrangements, wherein,
Described predetermined decision content is and is set explicitly by the detected maximum value to focal power of above-mentioned focus detection section.
11. camera arrangement according to claim 7, wherein,
Described camera body has the mode setting part that can set a plurality of patterns,
When described camera body control part is set to the common little pattern of permission depth ratio in the pattern of being set by described mode setting part, select described the 2nd focusing lens group by the described lens driving control part of described Department of Communication Force indication.
12. camera arrangement according to claim 7, wherein,
Described camera body has the mode setting part that can set a plurality of patterns,
Described camera body control part will send to described lens driving control part by the pattern that described mode setting part is set by described Department of Communication Force, when described lens driving control part is set to the common little pattern of permission depth ratio in described pattern, select described the 2nd focusing lens group.
13. a camera arrangement, it consists of with the camera body that this replacing camera lens can be installed by changing camera lens,
Described replacing camera lens has:
The 1st focusing lens group, it has the 1st image planes amount of movement with respect to the unit amount of movement;
The 2nd focusing lens group, it has the 2nd image planes amount of movement less than the 1st image planes amount of movement with respect to the unit amount of movement; And
The lens driving control part, it is controlled according to the driving of carrying out described the 1st focusing lens group or described the 2nd focusing lens group from the indication of described camera body,
Described camera body has focus detection section, and this focus detection section detects the focus condition of described the 1st focusing lens group and described the 2nd focusing lens group and calculates focusing position,
Described lens driving control part drives described the 1st focusing lens group to the focusing position from described camera body indication, and calculate the stop position of described the 1st focusing lens group that the driving resolution by described the 1st focusing lens group causes and the side-play amount between focusing position, carry out the driving of described the 2nd focusing lens group according to the described side-play amount of calculating.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-264778 | 2011-12-02 | ||
| JP2011264778A JP5904773B2 (en) | 2011-12-02 | 2011-12-02 | Camera system, interchangeable lens, and camera |
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| CN103135318A true CN103135318A (en) | 2013-06-05 |
| CN103135318B CN103135318B (en) | 2015-08-05 |
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| CN103926783A (en) * | 2014-04-30 | 2014-07-16 | 深圳市影歌科技有限公司 | Switching driving system and method for lens |
| CN104427247A (en) * | 2013-08-27 | 2015-03-18 | 奥林巴斯株式会社 | Imaging device, camera system, and control method for imaging device |
| CN105578031A (en) * | 2014-10-29 | 2016-05-11 | 佳能株式会社 | Image capturing accessory, image capturing apparatus and control method thereof |
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| CN109690378A (en) * | 2016-09-15 | 2019-04-26 | 富士胶片株式会社 | Lens devices, camera system and lens driving method |
| JP2020034691A (en) * | 2018-08-29 | 2020-03-05 | キヤノン株式会社 | Imaging control device, control method of the same, program thereof and recording medium thereof |
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| KR102232517B1 (en) | 2014-09-15 | 2021-03-26 | 삼성전자주식회사 | Method for capturing image and image capturing apparatus |
| JP6679656B2 (en) | 2018-05-30 | 2020-04-15 | キヤノン株式会社 | Interchangeable lens device, control method thereof, and imaging device |
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| CN104427247A (en) * | 2013-08-27 | 2015-03-18 | 奥林巴斯株式会社 | Imaging device, camera system, and control method for imaging device |
| CN103926783A (en) * | 2014-04-30 | 2014-07-16 | 深圳市影歌科技有限公司 | Switching driving system and method for lens |
| CN105578031A (en) * | 2014-10-29 | 2016-05-11 | 佳能株式会社 | Image capturing accessory, image capturing apparatus and control method thereof |
| CN105578031B (en) * | 2014-10-29 | 2018-08-17 | 佳能株式会社 | Image capture attachment, image capture apparatus and its control method |
| CN105629428A (en) * | 2014-11-26 | 2016-06-01 | 奥林巴斯株式会社 | Optical instrument and control method for lens |
| CN105629428B (en) * | 2014-11-26 | 2018-07-24 | 奥林巴斯株式会社 | Optical device and lens control method |
| CN109690378A (en) * | 2016-09-15 | 2019-04-26 | 富士胶片株式会社 | Lens devices, camera system and lens driving method |
| CN109690378B (en) * | 2016-09-15 | 2021-05-25 | 富士胶片株式会社 | Lens device, camera system and lens driving method |
| US11314040B2 (en) | 2016-09-15 | 2022-04-26 | Fujifilm Corporation | Lens apparatus, camera system, and lens driving method |
| JP2020034691A (en) * | 2018-08-29 | 2020-03-05 | キヤノン株式会社 | Imaging control device, control method of the same, program thereof and recording medium thereof |
| JP7134025B2 (en) | 2018-08-29 | 2022-09-09 | キヤノン株式会社 | IMAGING CONTROL DEVICE, CONTROL METHOD THEREOF, PROGRAM AND RECORDING MEDIUM |
| CN113126394A (en) * | 2021-04-23 | 2021-07-16 | 深圳市爱派赛科技有限公司 | Switchable double-lens applied to mobile terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5904773B2 (en) | 2016-04-20 |
| CN103135318B (en) | 2015-08-05 |
| JP2013117613A (en) | 2013-06-13 |
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