WO2004090630A1 - レンズ交換式カメラシステム - Google Patents
レンズ交換式カメラシステム Download PDFInfo
- Publication number
- WO2004090630A1 WO2004090630A1 PCT/JP2004/005053 JP2004005053W WO2004090630A1 WO 2004090630 A1 WO2004090630 A1 WO 2004090630A1 JP 2004005053 W JP2004005053 W JP 2004005053W WO 2004090630 A1 WO2004090630 A1 WO 2004090630A1
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- WO
- WIPO (PCT)
- Prior art keywords
- interchangeable lens
- cpu
- camera
- terminal
- lens
- Prior art date
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
- G03B17/14—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets interchangeably
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/18—Signals indicating condition of a camera member or suitability of light
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/26—Power supplies; Circuitry or arrangement to switch on the power source; Circuitry to check the power source voltage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
- H04N23/663—Remote control of cameras or camera parts, e.g. by remote control devices for controlling interchangeable camera parts based on electronic image sensor signals
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2217/00—Details of cameras or camera bodies; Accessories therefor
- G03B2217/007—Details of energy supply or management
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2217/00—Details of cameras or camera bodies; Accessories therefor
- G03B2217/18—Signals indicating condition of a camera member or suitability of light
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/65—Control of camera operation in relation to power supply
Definitions
- the present invention relates to an interchangeable lens camera system, and more particularly, to an interchangeable lens camera system including a camera body and an interchangeable lens that is detachable from the camera body.
- an interchangeable lens camera is not a camera in which a taking lens is fixed to a camera body as a so-called compact camera and is configured as a single body, but is a combination of a camera body and one of a plurality of interchangeable lenses. It is a camera, and sufficient consideration must be given to matching between the camera body and the interchangeable lens.
- the interchangeable lens when power is supplied from the power supply of the camera body to the electric circuit provided in the interchangeable lens, the interchangeable lens should be mounted at a predetermined timing after the interchangeable lens has been mounted on the camera body to prevent malfunction.
- the power supply method is described in, for example, Japanese Patent Application Laid-Open Nos. Sho 59-48742 and Sho 62-2677332. Is disclosed in
- a plurality of opposed contact terminals are provided on the camera body and the mount part of the interchangeable lens, and they are connected to each other upon completion of mounting the lens.
- a switch is provided that switches the state when the interchangeable lens to be attached to the camera body is completed, and the state change of the switch and the identification of the camera body are provided.
- a camera system in which power supply to a replacement lens is started in an AND condition with an operation state (for example, pressing a power switch on or pressing a release button). According to such a structure, power can be selectively supplied from the camera body to the interchangeable lens.
- an interchangeable lens manufactured by another manufacturer may be mounted on a camera body manufactured by one manufacturer, so a lens that cannot be guaranteed by the manufacturer that manufactured the camera body is mounted. This is because there is a risk that proper camera operation cannot be performed when the operation is performed.
- the camera body must be able to identify at least the manufacturer of the replacement lens.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lens in an interchangeable lens that prevents an inappropriate operation of the interchangeable lens when the interchangeable lens is attached to a camera body. Providing an interchangeable power camera system. Disclosure of the invention
- An interchangeable lens camera system includes a first CPU for controlling a photographing operation of a camera, an interlocking pin provided on a camera-side mount and displaced in accordance with the mounting operation of an interchangeable lens; Connected to each other, and is switched from the first state to the second state by the displacement of the interlocking pin according to the start of mounting of the interchangeable lens, and from the second state to the first state according to completion of mounting of the interchangeable lens.
- a camera body provided with a detection switch for switching to a state, and an interchangeable lens having a second CPU for controlling the lens operation.
- the detection switch is provided.
- the first CPU supplies a reset signal to the second CPU, and The reset signal is released in response to the switching of the knowledge switch from the second state to the first state.
- FIG. 1 is a perspective view showing a camera body and an interchangeable lens that can be attached to and detached from the camera body in an interchangeable lens system according to an embodiment of the present invention.
- FIG. 2 is an electric circuit diagram of the camera body in FIG.
- Fig. 3 is a block diagram showing the configuration of the electric circuit of the interchangeable lens in Fig. 1
- Fig. 4 is a camera block showing the state immediately before the interlocking pin fits into the engagement hole when the interchangeable lens is attached.
- Fig. 5 is a block diagram showing the configuration of the electric circuit of the body and the interchangeable lens, and Fig. 5 shows the configuration of the electric circuit of the camera body and the interchangeable lens showing the fitted state where the interlocking pin is inserted into the engagement hole after the interchangeable lens is mounted.
- Fig. 1 is a perspective view showing a camera body and an interchangeable lens that can be attached to and detached from the camera body in an interchangeable lens system according to an embodiment of the present invention.
- FIG. 2 is an electric circuit diagram of
- FIG. 6 is a timing chart showing the operation of the CPU of the camera before and after attaching the interchangeable lens.
- Fig. 7 shows the authentication operation of the interchangeable lens after attaching the interchangeable lens to the camera body. Focusing on CPU operation Is a Furochiya one door shown Te. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a perspective view showing a camera body and an interchangeable lens that can be attached to and detached from the camera body in an interchangeable lens type camera system according to an embodiment of the present invention.
- the front of the lens optical axis 0 is defined as the subject side, and the rear is defined as the imaging plane side.
- a so-called bayonet mount is used as a mount for mounting the interchangeable lens in the present invention.
- a mount mounting portion 7 for mounting the interchangeable lens 10 is formed at the center of the front of the camera body 1 so as to protrude forward, and is formed on the front surface 7a of the mount mounting portion 7. Is from a horizontal plane perpendicular to the optical axis 0
- An annular camera-side mount portion 2 having a mounting surface 2 a is fixed by three screws 3.
- an interlocking pin that fits into the engagement hole 12 of the interchangeable lens 10 is provided. 4 is disposed so as to protrude forward by being urged by a pressing panel 4 a (see FIG. 2) embedded in the mounting portion 2.
- three bayonet claw engagement portions 5 into which three bayonet claw portions 13 of the interchangeable lens 10 are slide-inserted are formed at equal intervals on the inner peripheral edge of the camera-side mount portion 2.
- the front surface 7a of the mount mounting unit 7 contacts (connects to) a plurality of lens-side terminal groups 14 formed on the interchangeable lens 10.
- a plurality of camera-side terminal groups 6 (contact terminal means) having hemispherical contact surfaces protruding forward are provided.
- a mounting release button 8 for the interchangeable lens 10 is provided on the right side of the mount mounting section 7.
- the release button 8 separates the interlocking pin 4 projecting forward in the engagement hole 12 of the interchangeable lens 10 from the engagement hole 12 of the interchangeable lens 10 when the lens is detached. It is for.
- the interchangeable lens 10 has a plurality of lens groups 10a inside, and an annular lens-side mount portion 11 is formed on the rear end surface.
- the lens-side mount portion 11 abuts the bayonet surface 11 a that is in contact with the camera-side mount surface 2 a and that is a surface perpendicular to the optical axis 0.
- On the outer peripheral edge of the bayonet surface 11a three outwardly projecting bayonet claws 13 formed on the same plane as the bayonet surface 11a are formed. .
- the engagement hole 12 into which the interlocking pin 4 is fitted is provided on the lens side mount portion 11. It is drilled deeper than the protrusion of the interlocking pin 4 protruding from the camera surface 2a.
- the lens-side bayonet surface 1la is in sliding contact with a plurality of the camera-side terminal groups 6 (connection).
- a plurality of the above-mentioned lens side terminal groups 14 are arranged.
- the plurality of lens-side terminal groups 14 form a part of the interchangeable lens-side terminal group and the transmitting means in the present invention, and are flush with the lens-side bayonet surface 11a. It is formed as follows.
- the three bayonet claws 13 of the interchangeable lens 10 must be respectively attached to the three bayonet claws of the camera body 1. Fit between joints 5. At this time, the link pin 4 is pressed by the lens-side mount portion 11 and retreats.
- the interchangeable lens 10 is rotated around the optical axis 0 until it stops in one direction. Then, the lens is fixed and mounted at a position where the three bayonet claw portions 13 are engaged with the three bayonet claw engagement portions 5. During this time, the linking pin 4 is retracted while being pressed by the lens-side mount portion 11, and then fits into the engagement hole 12 at the lens mounting position. In a state in which the interlocking pin 4 has been inserted from a state immediately before being inserted into the engagement hole 12, the plurality of camera-side terminal groups 6 provided in the camera body 1 are connected to the plurality of camera-side terminal groups 6 provided in the interchangeable lens 10. Contact the lens terminal group 14 correctly. In this way, the interchangeable lens 10 is mounted on the camera body 1.
- the lens is rotated in a direction opposite to that when the interchangeable lens 10 is mounted.
- the three bayonet claw portions 13 slide inside the three bayonet claw engagement portions 5 in a direction opposite to the direction in which the three bayonet claw engagement portions 5 are mounted, and separate from the three bayonet claw engagement portions 5.
- the interchangeable lens 10 in the optical axis direction To release the attachment to the camera body 1. In this way, the interchangeable lens 10 is detached from the camera body 1.
- FIG. 2 is a block diagram showing a configuration of an electric circuit in the camera body 1 of FIG.
- the electric circuit of the camera body 1 includes a camera CPU 21 which is a first CPU for controlling the entire operation of the camera body 1 and a camera ROM 22 (first memory) which constitutes a first memory.
- a camera CPU 21 which is a first CPU for controlling the entire operation of the camera body 1 and a camera ROM 22 (first memory) which constitutes a first memory.
- a first electric circuit 20 (first electric circuit means) having a voltage stabilizing circuit 24, and a power supply circuit 23 (power supply means) comprising a power supply battery 23a or an AC adapter (not shown).
- a detection switch 25 (mounting completion detection means) (mounting start detection means) (detection means), which comprises a push switch and detects the state of the interlocking pin 4 urged by the pressing spring 4a.
- the main part is composed of the terminal group 6 on the camera side composed of terminals.
- the CPU 21 constitutes a determination unit, a permission unit, a supply unit, a power supply start unit, a release unit, a
- the camera CPU 21 has a power supply terminal Vcc1, a voltage stabilization circuit control terminal VCONT, a lens detection terminal LSDT CT (signal input port of the first CPU), a lens reset terminal LSRST (a first CPU Signal output port), lens CPU start response terminal LSL 2 B1, communication request terminal LSB 2 L1, communication data terminal LSDI 01, communication terminal LSCLK 1, communication terminal for adapter LSB 2A 1, Lock pin switch (SW) terminal LP SW, GND terminal. Further, the camera CPU 21 has an unillustrated timer used to release a reset signal output from the lens reset terminal LSRST to the lens CPU 41 of the interchangeable lens 10 (see FIG. 3), which will be described later. I have.
- the camera-side terminal group 6 is a first terminal for supplying power to the interchangeable lens 10.
- a power camera: OM22, camera CPU 21 and voltage stabilization circuit 24 are connected between the camera-side power line and camera-side ground line of the power circuit 23, respectively, and the detection switch 25
- the fixed terminal is also connected to the camera-side ground line.
- the camera CPU 21 has its terminal V cc 1 connected to the camera-side power supply line, the terminal V CONT connected to the input terminal of the voltage stabilizing circuit 24, and the terminal LSDTCT connected to the first signal terminal.
- the terminal LSRST is connected to the second signal terminal 28 b
- the LSL 2 B 1 terminal is connected to the first communication terminal 29 a
- the LSB 2 L 1 terminal is The second communication terminal 29 b is connected to the above
- the LSD I 01 terminal is connected to the third communication terminal 29 c
- the LSCLK 1 terminal is connected to the fourth communication terminal 29 d
- the LSB 2 A 1 terminal is connected to the fifth communication terminal 29 e
- the LP SW terminal is connected to the detection switch 25, and the GND terminal is connected to the camera-side ground line. .
- the camera ROM 22 is connected to the camera CPU 21, and the output terminal of the voltage stabilization circuit 24 is connected to the first power terminal 26, and the first ground terminal 27 Is connected to the camera side ground line.
- the camera ROM 22 is composed of, for example, a non-volatile memory. It stores data for authenticating the manufacturer ID (manufacturer code) of the interchangeable lens 10 as shown in Table 2 described below.
- the camera ROM 22 may be provided in the CPU 21.
- the voltage stabilizing circuit 24 is constituted by, for example, a DC / DC converter, and is controlled by the VC 0 NT terminal of the CPU 21 to stabilize the voltage output from the power supply circuit 23, and Is supplied to the interchangeable lens 10 via the first power supply terminal 26 as a power supply voltage.
- the interlocking pin 4 is urged by the pressing spring 4a so that the front end protrudes forward from the camera-side mounting surface 2a, and the rear end.
- the unit is located at a position spaced forward from the detection switch 25. At this time, the push switch of the detection switch 25 is in the off state, which is the first state in the present invention.
- FIG. 3 is a block diagram showing a configuration of an electric circuit of the interchangeable lens 10 of FIG.
- the electric circuit of the interchangeable lens 10 includes a lens CPU 41 (reading means), which is a second CPU for controlling the operation of the entire interchangeable lens 10, and a lens ROM 42 (a second memory).
- the main part is constituted by a second electric circuit 40 (second electric circuit means) having a second storage means), a motor drive circuit 43, and a voltage conversion circuit 44.
- Lens CPU 41 has power supply terminal V cc 2, reset terminal: RE SET, lens CPU start output terminal LSL 2 B 2, communication output terminal LSB 2 L 2, communication terminal LSDI 02, communication clock terminal LSCLK 2, Adapter communication terminal LSB 2 A 2, GND terminal.
- the lens side terminal group 14 includes a second power supply terminal 46 for supplying power to the lens CPU 41, a second ground terminal 47, and a third signal terminal 48 for detecting the attachment of the interchangeable lens 10.
- a Camera CPU2 1 above lens Reset terminal
- a lens side signal terminal 48 composed of a fourth signal terminal 48b for inputting a reset signal from LSRST, a sixth communication terminal 49a, a seventh communication terminal 49b, The 8th communication terminal 49c, the ninth communication terminal 49d, and the 10th communication terminal 49e, and the lens side for mutual communication between the camera CPU 21 and the lens CPU 41 Communication terminals 49 are provided.
- the first power terminal 26 is connected to the second power terminal 46, and the second ground terminal 47 is connected to the lens side terminal group 14.
- the first ground terminal 27 is connected to the lens-side signal terminal 48
- the camera-side signal terminal 28 is connected to the lens-side communication terminal 49
- the camera-side communication terminal 29 is connected to the lens-side communication terminal 49. Contact it to it.
- the motor drive circuit 43 is connected between the lens-side power line connected to the second power terminal 46 and the lens-side ground line connected to the second ground terminal 47 and the third signal terminal 48a. ing.
- the terminal V cc 2 of the lens CPU 41 is connected to the lens power supply line via the voltage conversion circuit 44, the RESET terminal is connected to the fourth signal terminal 48b, and the LSL 2 B 2 terminal Is connected to the sixth communication terminal 49a, the LSB 2 L2 terminal is connected to the seventh communication terminal 49b, the SDI 02 terminal is connected to the eighth communication terminal 49c, The LSCLK 2 terminal is connected to the ninth communication terminal 49 d, the LSB 2 A 2 terminal is connected to the 10th communication terminal 49 e, and the GND terminal is connected to the lens side ground line. I have.
- the lens ROM 42 is connected between the terminal Vcc 2 of the lens CPU 41 and the ground line on the lens side, and its output end is connected to the lens CPU 41.
- the lens ROM 42 is composed of, for example, a non-volatile memory. Lens type of the interchangeable lens 10, as shown in Table 1 above, the lens ID, Ichiriki ID 3 zoom division number menu, the open F Reality, and the Isseki de such as minimum F wrecked remembers.
- the lens ROM 42 may be provided in the lens CPU 41.
- the motor drive circuit 43 is a circuit for driving a motor (not shown) built in the interchangeable lens 10, and moves a plurality of AF control lens groups 10a (see FIG. 1) in the optical axis direction. AF control is performed.
- the voltage conversion circuit 44 is formed of, for example, a voltage regulator circuit, and converts the power supplied from the voltage stabilization circuit 24 of the camera body 1 to supply the lens CPU 41 to the lens CPU 41. And a circuit for supplying the converted power to the lens ROM 42.
- the second electric circuit 40 By configuring the second electric circuit 40 in this manner, the power from the power supply circuit 23 of the camera body 1 (see FIG. 2) is supplied to the motor drive circuit 43 without passing through the voltage conversion circuit 44. In addition, power is supplied to the lens CPU 41 and the lens ROM 42 via the voltage conversion circuit 44 for control.
- FIG. 4 shows a state of the interchangeable lens 10 including the camera body 1 shown in FIG. 2 and the interchangeable lens 10 shown in FIG.
- FIG. 5 is a block diagram showing the configuration of the electric circuit of the present embodiment
- FIG. 5 shows the configuration of the electric circuit of the interchangeable lens camera system showing a state after the interlocking pin 4 is fitted into the engagement hole 12 after the interchangeable lens 10 is mounted.
- FIG. 6 is a timing chart showing the operation of the CPU 21 of the camera body 1 before and after the interchangeable lens 10 is mounted. As shown in FIG. 6, in the interchangeable lens camera system 100, the mounting state of the interchangeable lens 10 on the camera body 1 is started, that is, the three bayonet claw engaging portions 5 of the camera body 1 (see FIG. 1).
- the camera CPU 21 In response to the LPSW being turned on, the camera CPU 21 outputs a mouth signal as a reset signal from the lens reset terminal LSRST in a high impedance state as shown in FIG. In this state, since the camera-side terminal group 6 and the lens-side terminal group 14 are not yet in contact with each other, the reset signal from the lens reset terminal LSRST is not sent to the lens CPU 41.
- the detection switch 25 is turned on and immediately before the interlocking pin 4 is inserted into the engagement hole 12 as shown in FIG. 4, the camera-side terminal group 6 and the lens-side terminal group 14 are rotated. Contact.
- the lens reset terminal LSRST of the camera CPU 21 Since the reset signal that is continuously output is input to the reset terminal RESET of the lens CPU 41, the lens CPU 41 is reset.
- the first signal terminal 28a of the camera-side terminal group 6 and the third signal terminal 48a of the lens-side terminal group 14 come into contact with each other, the first signal terminal 28a and the third signal terminal 48a Is in the state of falling to GND.
- the camera CPU 21 When this GND state is detected via the lens detection terminal LSDTCT of the camera CPU 21 connected to the first signal terminal 28a, the camera CPU 21 outputs an operation signal to the voltage stabilization circuit control terminal VCONT. I do.
- an operating voltage of, for example, 4.2 V is supplied from the power supply circuit 23 to the first power supply terminal 26 of the camera-side terminal group 6 connected to the terminal V CONT via the voltage stabilization circuit 24. start. That is, power is supplied while the reset signal is being output to the lens CPU 41.
- the detection switch 25 changes from the second state to the first state, that is, from the on state to the off state in the present invention. Accordingly, the lock pin switch terminal LPSW of the camera CPU 21 changes from the on state to the off state as shown in FIG.
- the camera CPU 21 In response to the OFF state of the lock pin switch terminal LP SW, the camera CPU 21 measures a predetermined time set in consideration of the switch chattering time by an evening timer (not shown), and then outputs a signal from the lens reset terminal L SRST. Release the reset signal that is being output. That is, the reset state of the lens CPU 41 is released. As a result, the lens CPU 41 starts operating.
- the power supply to the lens CPU 41 is performed. I'm getting started.
- FIG. 7 is a flow chart showing the authentication operation of the interchangeable lens 10 after the interchangeable lens 10 of FIG. 3 is attached to the camera body 1 of FIG. 2, focusing on the operation of the CPU 21.
- Table 1 is a table showing various data stored in the lens ROM 42 of the interchangeable lens 10 in FIG. 3, and Table 2 is a memory stored in the camera ROM 22 of the camera body 1 in FIG. This is a table showing IDs.
- step S1 the camera CPU 21 releases the reset signal output from the lens reset terminal LSRST (see FIG. 5), and then mounts the camera as shown in FIG. After a lapse of a predetermined time t from the completion, a high (H) signal, which is a communication request signal, is output from the communication request terminal LSB2L1 to the lens CPU 41, and the process proceeds to step S2.
- H high
- step S2 in response to the output of the communication request signal from the terminal LSB2L1 in step S1, the lens CPU activation response terminal LSL2B1 of the camera CPU21 is set to the high (H) level.
- H the high
- the start signal output from the lens CPU start output terminal LSL 2 B 2 of the lens CPU 41 is It is determined whether 1 has been input. If the terminal LSL2B1 is at the high (H) level, the process proceeds to step S3. If not, the process branches to step S7.
- step S7 the output from the terminal LSB2L1 is received, and the time until the terminal LSL2B1 becomes a high (H) level is counted. If this time has not elapsed the prescribed time, the flow returns to step S2, and if it has elapsed, the flow proceeds to step S8.
- step S2 the camera CPU 21 and the lens CPU 41 are in a state in which they can communicate with each other because the terminal LSL 2 B 1 goes high (H) level. Therefore, in step S3, data communication is performed between the camera CPU 21 and the lens CPU 41.
- This data communication is a so-called generally known serial communication.
- the communication clock signal is output from the communication clock terminal LSCLK 1 of the camera CPU 21, and thereafter, the communication data is output from the communication data terminal LSD I 01 to the lens CPU 41. .
- the lens CPU 41 connects to the communication terminal LSDI 02 From the lens ROM42 (see Fig. 3) stored in the lens ROM42 (see Fig. 3), such as the lens type, lens ID, manufacturer ID, zoom division number, open FNo, and minimum FNo. Output to the terminal LSDI 01.
- the lens type is a data representing the function of the lens
- the lens ID is a data for identifying a lens model and an individual.
- the above-mentioned ID is the data for identifying the lens manufacturer
- the above-mentioned zoom division number is the data showing the division number of the zoom encoder of the lens
- the above FNo is the lens at each zoom position.
- the minimum FNo represents the minimum aperture value of the lens at each zoom position.
- the byte length indicates the size of the data, and the lens type, the lens ID, the number of zoom divisions, the open FNo, and the minimum FNo are data used for the photographing operation.
- step S 4 After outputting various data from the lens CPU 41 to the communication data terminal LSDI 01 of the camera CPU 21, the flow shifts to step S 4.
- step S4 the camera CPU 21 stores the maker ID among the various lens data input to the communication data terminal LSDI 01 in the camera ROM 22 (see FIG. 2).
- the process proceeds to step S5 by referring to the specified ID table.
- this manufacturer ID table a list of manufacturers of interchangeable lenses capable of appropriately controlling the operation of the camera with the power camera CPU 21 is input.
- step S5 it is determined (certified) whether or not the maker ID table in the camera ROM 22 and the home ID input from the lens ROM 42 match. If they match, proceed to step S6, where the power of camera body 1 is A normal camera operation performed by the camera CPU 21 controlling the lens CPU 41 of the interchangeable lens 10 is performed. On the other hand, if they do not match, the process branches to step S8.
- step S8 when the lens CPU 41 does not respond to the communication request from the camera CPU 21 in step S7 described above, or in step S5, the maker ID table in the camera ROM 22 and the output from the lens ROM 42 are output. If the specified manufacturer ID does not match, a lens mismatch warning is issued to a display device such as an LCD (not shown) of the camera body 1 under the control of the camera CP ⁇ 21, and the interchangeable lens worn by the user is Inform camera 1 that it cannot be used. Note that this lens non-conformity warning may be issued by emitting a ⁇ ⁇ ⁇ ⁇ sound from the camera body. Thereafter, the process proceeds to step S9, and in step S9, the operation of the camera body 1 is stopped.
- the camera stored in the lens ROM 42 by the mutual communication between the camera body 1 and the interchangeable lens 10.
- the ID code By reading the ID code and referring to the manufacturer ID table stored in the camera ROM 22, it is checked whether or not the attached interchangeable lens is an appropriate interchangeable lens, authenticated. If appropriate, the camera will operate for the first time.
- the camera CPU 21 of the camera body 1 performs the ON detection of the detection switch 25 using the interlocking pin 4 to surely reset the lens CPU 41, and thereafter, the camera body 1 Power is now supplied to CPU41.
- an interchangeable lens camera system in which an interchangeable lens is prevented from performing an improper operation when the interchangeable lens is mounted on a camera body. Can be.
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Structure And Mechanism Of Cameras (AREA)
- Indication In Cameras, And Counting Of Exposures (AREA)
- Lens Barrels (AREA)
- Camera Bodies And Camera Details Or Accessories (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04726620.0A EP1612598B1 (en) | 2003-04-08 | 2004-04-08 | Camera system with an exchangeable lens |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2003104487 | 2003-04-08 | ||
JP2003-104487 | 2003-04-08 | ||
JP2003166886A JP4477313B2 (ja) | 2003-04-08 | 2003-06-11 | レンズ交換式カメラシステム |
JP2003-166886 | 2003-06-11 |
Publications (1)
Publication Number | Publication Date |
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WO2004090630A1 true WO2004090630A1 (ja) | 2004-10-21 |
Family
ID=33134336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/005053 WO2004090630A1 (ja) | 2003-04-08 | 2004-04-08 | レンズ交換式カメラシステム |
Country Status (4)
Country | Link |
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US (1) | US6845218B2 (ja) |
EP (1) | EP1612598B1 (ja) |
JP (1) | JP4477313B2 (ja) |
WO (1) | WO2004090630A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
US20040202464A1 (en) | 2004-10-14 |
US6845218B2 (en) | 2005-01-18 |
JP4477313B2 (ja) | 2010-06-09 |
JP2004361898A (ja) | 2004-12-24 |
EP1612598A1 (en) | 2006-01-04 |
EP1612598A4 (en) | 2009-09-16 |
EP1612598B1 (en) | 2013-05-29 |
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