JP6414180B2 - Interchangeable lens and camera body - Google Patents

Description

  The present invention relates to an interchangeable lens and a camera body.

  A camera system including a camera body and an interchangeable lens that can be attached to and detached from the camera body is known. For example, Patent Document 1 describes a camera system that includes a camera body and a camera head and initializes the camera head.

JP 2006-319631 A

In an interchangeable lens attached to a camera, a mechanism different from the conventional technology is desired regarding a mechanism related to initialization of the interchangeable lens.

The interchangeable lens according to the first aspect of the present invention is an interchangeable lens attached to a camera body, and a driven member whose position is changed by receiving a driving force, and an initialization for controlling an initialization process for the driven member. A first contact for transmitting position information relating to the position of the driven member driven by the driving force to the camera body, and initialization information indicating the status of the initialization process of the driven member A second contact different from the first contact for transmitting to the camera body, and the position information is transmitted at a cycle faster than the initialization information.
  An interchangeable lens according to a second aspect of the present invention is an interchangeable lens that is attached to a camera body, and includes a driven member that changes its position upon receiving a driving force, and an initialization that controls initialization processing for the driven member. Initialization information indicating a status of the initialization processing of the driven member, a first transmission unit that transmits position information related to a position of the driven member to the camera body via a first transmission path And a second transmission unit that transmits to the camera body via a second transmission path different from the first transmission path, and the position information is transmitted at a cycle faster than the initialization information. Is done.
  An interchangeable lens according to a third aspect of the present invention is an interchangeable lens having a driven member whose position changes upon receiving a driving force, and performs a process related to initialization on the driven member, and the driven member Position information relating to the position of the driven member is transmitted to the camera body via the first contact, and initialization information indicating the status of the process relating to the initialization of the driven member is sent via a second contact different from the first contact. The position information is transmitted at a faster cycle than the initialization information.
  An interchangeable lens according to a fourth aspect of the present invention is an interchangeable lens attached to a camera body, and includes a plurality of driven members whose positions are changed by receiving a driving force, and initialization of each of the plurality of driven members. An initialization unit for controlling processing; a first contact for transmitting position information relating to a position of at least one driven member of the plurality of driven members to the camera body; and a plurality of driven members. A second contact different from the first contact for transmitting initialization information individually indicating the status of the initialization processing to each of the camera bodies, and the position information is the initialization information It is transmitted at a faster cycle than information.
  An interchangeable lens according to a fifth aspect of the present invention is an interchangeable lens attached to a camera body, and includes a plurality of driven members whose positions are changed by receiving a driving force, and initialization of each of the plurality of driven members. An initialization unit that controls processing; a first transmission unit that transmits position information regarding the position of at least one driven member of the plurality of driven members to the camera body via a first transmission path; Second transmission for transmitting initialization information individually indicating the status of the initialization process for each of the plurality of driven members to the camera body via a second transmission path different from the first transmission path. The position information is transmitted at a faster cycle than the initialization information.
  An interchangeable lens according to a sixth aspect of the present invention is an interchangeable lens having a plurality of driven members whose positions change upon receiving a driving force, and performs processing related to initialization for each of the plurality of driven members. Executing, transmitting position information relating to the position of at least one driven member of the plurality of driven members to the camera body via the first contact, and processing relating to the initialization for each of the plurality of driven members The initialization information individually indicating the situation is transmitted to the camera body via a second contact different from the first contact, and the position information is transmitted at a faster cycle than the initialization information.
  A camera body according to a seventh aspect of the present invention includes a mounting portion to which an interchangeable lens having a plurality of driven members whose driving positions are changed by receiving a driving force is detachably mounted, and among the plurality of driven members A first receiving unit that receives position information regarding the position of at least one driven member from the interchangeable lens via a first contact, and an initialization process performed by the interchangeable lens for each of the plurality of driven members A second receiving unit for receiving initialization information indicating the status of each driven member from the interchangeable lens via a second contact different from the first contact, and the position information is the initial information It is received at a cycle faster than the information.

It is the perspective view which showed the lens-interchangeable camera system to which this invention is applied. It is sectional drawing which showed the lens-interchangeable camera system to which this invention is applied. It is a schematic diagram which shows the detail of the holding | maintenance part 102,202. It is a timing chart which shows the example of command data communication. It is a timing chart which shows the example of hotline communication. It is a figure which shows the structure of initialization status data. It is a time chart showing the execution order of the initialization process after power-on. It is a figure which shows the structure of driven state data. It is a flowchart which shows the process until it becomes possible to image | photograph from power-on operation. It is a time chart showing the execution order of the initialization process after power-on.

(First embodiment)
FIG. 1 is a perspective view showing an interchangeable lens type camera system to which the present invention is applied. FIG. 1 shows only devices and apparatuses according to the present invention, and illustration and description of other devices and apparatuses are omitted. The camera 1 includes a camera body 100 and an interchangeable lens 200 that can be attached to and detached from the camera body 100.

  The camera body 100 is provided with a lens mount 101 to which the interchangeable lens 200 is detachably attached. At a position near the lens mount 101 of the camera body 100 (inner peripheral side of the lens mount 101), a holding part (electrical connection) that holds a contact in a state of partially protruding toward the inner peripheral side of the lens mount 101 Part) 102 is provided. The holding portion 102 is provided with a plurality of contacts.

  The interchangeable lens 200 is provided with a lens mount 201 to which the camera body 100 is detachably attached corresponding to the lens mount 101 on the body side. At a position near the lens mount 201 of the interchangeable lens 200 (inner peripheral side of the lens mount 201), a holding portion (electrical connection) that holds a contact in a state of partially protruding toward the inner peripheral side of the lens mount 201 Part) 202 is provided. The holding portion 202 is provided with a plurality of contacts.

  When the interchangeable lens 200 is attached to the camera body 100, the holding unit 102 provided with a plurality of contacts is electrically and physically connected to the holding unit 202 provided with a plurality of contacts. Both holders 102 and 202 are used for power supply from the camera body 100 to the interchangeable lens 200 and transmission / reception of signals between the camera body 100 and the interchangeable lens 200.

  An imaging element 104 such as a CMOS or CCD is provided behind the lens mount 101 in the camera body 100. Above the camera body 100, a button 107 serving as an input device is provided. The user uses the input device such as the button 107 to instruct the camera body 100 to shoot, set shooting conditions, and the like.

  FIG. 2 is a cross-sectional view showing an interchangeable lens type camera system to which the present invention is applied. The interchangeable lens 200 includes an imaging optical system 210 that forms a subject image. The imaging optical system 210 includes a plurality of lenses 210 a to 210 c and a diaphragm 211. The plurality of lenses 210a to 210c include a focusing lens 210b for controlling the focus position of the subject image and a shake correction lens 210c for correcting image blur of the subject image.

  Inside the interchangeable lens 200, a lens control unit 203 that controls each part of the interchangeable lens 200 is provided. The lens control unit 203 includes a microcomputer (not shown) and its peripheral circuits. The lens control unit 203 is connected to a lens side first communication unit 217, a lens side second communication unit 218, a focusing lens driving unit 212, a blur correction lens driving unit 213, an aperture driving unit 214, a ROM 215, and a RAM 216. .

  The lens side first communication unit 217 and the lens side second communication unit 218 exchange data with the camera body 100 via the communication contacts of the holding units 102 and 202. The lens side first communication unit 217 and the lens side second communication unit 218 are communication interfaces on the interchangeable lens 200 side, respectively. The lens control unit 203 performs communication (hotline communication, command data communication) described later with the camera body 100 (body control unit 103 described later) using these communication interfaces.

  The focusing lens driving unit 212 includes an actuator such as a stepping motor, for example, and drives the focusing lens 210b in accordance with a signal input to the focusing lens driving unit 212. Similarly, the blur correction lens driving unit 213 and the diaphragm driving unit 214 have actuators such as a voice coil motor, for example, and drive the blur correction lens 210c and the diaphragm 211, respectively, according to an input signal.

  The focusing lens 210b is driven in the optical axis direction by the focusing lens driving unit 212. The shake correction lens 210c is driven in the vertical direction (X direction, Y direction) of the optical axis by the shake correction lens driving unit 213. The diaphragm 211 is driven by the diaphragm driving unit 214 so that the size of the opening (opening diameter) for passing the subject light changes. That is, each of these members is a driven member whose driven state changes when driven by receiving a driving force from each driving unit. Here, the driven state refers to a state that is changed by driving the driven member, among the states unique to each driven member. For example, in the case of the focusing lens 210b, the position in the optical axis direction, in the case of the shake correction lens driving unit 213, in the plane perpendicular to the optical axis, and in the case of the stop 211, the aperture diameter (and the imaging optics that changes according to the aperture diameter). The F value of the system 210) is included in the driven state.

  Driven members other than the above-described driven members (focusing lens 210b, blur correction lens 210c, diaphragm 211) may be provided in the interchangeable lens 200. For example, as with the focusing lens 210b, a zoom lens is provided as a member that can move in the optical axis direction of the imaging optical system 210, and a mechanism (so-called power zoom mechanism) that electrically drives the zoom lens is replaced with an interchangeable lens. 200 may be provided.

  The ROM 215 is a non-volatile storage medium, and stores a predetermined control program executed by the lens control unit 203 in advance. The RAM 216 is a volatile storage medium and is used as a storage area for various data by the lens control unit 203.

  The lens control unit 203 includes an initialization status transmission unit 221, a driven state transmission unit 222, and an initialization control unit 223 depending on the software form. Each of these functional units is realized by software by the lens control unit 203 executing a predetermined control program stored in the ROM 215.

  The initialization control unit 223 executes a predetermined initialization process for each of the plurality of driven members described above. The initialization status transmission unit 221 includes, for each of the plurality of driven members, initialization status data indicating the status of the initialization process (for example, status data indicating whether the execution of the initialization process has been completed or not). The data is transmitted to the camera body 100 at predetermined intervals via a first transmission path (detailed later). The driven state transmitting unit 222 transmits the above-described driven state data representing the driven state of the plurality of driven members via a second transmission path (detailed later) different from the first transmission path at predetermined intervals. Send to the body. Here, a mechanism in which the initialization status transmission unit 221 transmits initialization status data to the camera body 100 at predetermined intervals will be described. The camera body 100 issues a command requesting initialization status data to the interchangeable lens 200 at predetermined intervals until a signal indicating completion of the initialization process is received from the interchangeable lens 200. The interchangeable lens initialization status transmission unit 221 responds the prepared initialization status data to this request command. With this mechanism, the initialization status transmission unit 221 transmits initialization status data to the camera body 100 at a predetermined period.

  A shutter 115 for controlling the exposure state of the image sensor 104 and an optical filter 116 combining an optical low-pass filter and an infrared cut filter are provided on the front surface of the image sensor 104. The subject light that has passed through the imaging optical system 210 enters the image sensor 104 via the shutter 115 and the filter 116.

  Inside the camera body 100, a body control unit 103 that controls each part of the camera body 100 is provided. The body control unit 103 includes a microcomputer (not shown), a RAM, and peripheral circuits thereof.

  A body-side first communication unit 117 and a body-side second communication unit 118 are connected to the body control unit 103. The body-side first communication unit 117 is connected to the holding unit 102, and can exchange data with the lens-side first communication unit 217 via a plurality of contacts provided on the holding unit 102. Similarly, the body side second communication unit 118 can exchange data with the lens side second communication unit 218. In other words, each of the body-side first communication unit 117 and the body-side second communication unit 118 is a body-side communication interface. The body control unit 103 performs communication (hotline communication and command data communication) described later with the interchangeable lens 200 (lens control unit 203) using these communication interfaces.

  A display device 111 configured by an LCD panel or the like is disposed on the back surface of the camera body 100. The body control unit 103 displays various menu screens for setting an image of a subject (a so-called through image) based on the output of the image sensor 104, shooting conditions, and the like on the display device 111.

  The body control unit 103 includes an initialization status receiving unit 121, a driven state receiving unit 122, and a drive control unit 123 in software form. Each of these functional units is realized in software by the body control unit 103 executing a predetermined control program. The initialization status reception unit 121 receives the initialization status data transmitted by the initialization status transmission unit 221. The driven state receiving unit 122 receives driven state data representing the driven states of the plurality of driven members transmitted by the driven state transmitting unit 222. The drive control unit 123 executes control processing (described later) for each driven member based on the initialization status data received by the initialization status reception unit 121.

(Description of holding units 102 and 202)
FIG. 3 is a schematic diagram showing details of the holding units 102 and 202. In FIG. 3, the holding portion 102 is arranged on the right side of the lens mount 101 in accordance with the actual mount structure. That is, the holding portion 102 of the present embodiment is disposed at a location deeper than the mount surface of the lens mount 101 of the camera body 100 (a location on the right side of the lens mount 101 in FIG. 3). Similarly, the holding unit 202 is arranged on the right side of the lens mount 201 because the holding unit 202 of this embodiment is arranged at a position protruding from the mount surface of the lens mount 201 of the interchangeable lens 200. Represents. Since the holding unit 102 and the holding unit 202 are arranged in this way, when the mount surface of the lens mount 101 and the mount surface of the lens mount 201 are brought into contact with each other, the camera body 100 and the interchangeable lens 200 are mounted and coupled. The holding part 102 and the holding part 202 are connected, and the electrical contacts provided in both holding parts are also connected. Since such a mount structure is well known, further explanation and illustration are omitted.

  As shown in FIG. 3, the holding unit 102 has 12 contacts BP <b> 1 to BP <b> 12. The holding unit 202 has twelve contacts LP1 to LP12 corresponding to the twelve contacts described above.

  The contacts BP1 and BP2 are connected to the first power supply circuit 130 in the camera body 100. The first power supply circuit 130 has a drive system such as an actuator at the contact point BP1, and has an interchangeable lens excluding circuits (such as a focusing lens drive unit 212, a shake correction lens drive unit 213, and an aperture drive unit 214) that consume relatively large power. The operating voltage of each part in 200 is supplied. That is, the operating voltage of each part in the interchangeable lens 200 excluding the above driving parts is supplied from the contact BP1 and the contact LP1. The voltage value that can be supplied to the contact point BP1 has a range between the minimum voltage value and the maximum voltage value (for example, a voltage width in the 3V range). The voltage value that is normally supplied is the maximum voltage value and the minimum voltage value. Is a voltage value in the vicinity of the intermediate value. As a result, the current value supplied from the camera body 100 side to the interchangeable lens 200 side is a current value within a range of about several tens of mA to several hundreds of mA in the power-on state.

  The contact BP2 is a ground terminal corresponding to the operating voltage given to the contact BP1. That is, the contact BP2 and the contact LP2 are ground terminal voltages corresponding to the above operating voltage.

  In the following description, the signal line constituted by the contact point BP1 and the contact point LP1 is referred to as a signal line V33. A signal line constituted by the contact point BP2 and the contact point LP2 is referred to as a signal line GND. These contacts LP1, LP2, BP1, BP2 constitute a power supply system contact for supplying power from the camera body 100 side to the interchangeable lens 200 side.

  The contacts BP3, BP4, BP5, and BP6 are connected to the body-side first communication unit 117. The contact points LP3, LP4, LP5, and LP6 on the interchangeable lens 200 side corresponding to these contact points are connected to the lens-side first communication unit 217. The body-side first communication unit 117 and the lens-side first communication unit 217 transmit and receive data to and from each other using these contact points (communication system contact points). The contents of communication performed by the body-side first communication unit 117 and the lens-side first communication unit 217 will be described in detail later.

  In the following description, a signal line constituted by the contact BP3 and the contact LP3 is referred to as a signal line CLK. Similarly, the signal line constituted by the contact BP4 and the contact LP4 is signal line BDAT, the signal line constituted by the contact BP5 and the contact LP5 is signal line LDAT, and the signal line constituted by the contact BP6 and the contact LP6 is signaled. Called line RDY.

  The contacts BP7, BP8, BP9, and BP10 are connected to the body-side second communication unit 118. The contacts LP7, LP8, LP9, and LP10 on the interchangeable lens 200 side corresponding to these contacts are connected to the lens-side second communication unit 218. The lens-side second communication unit 218 transmits data to the body-side second communication unit 118 using these contacts (communication system contacts). The contents of communication performed by the body-side second communication unit 118 and the lens-side second communication unit 218 will be described in detail later.

  In the following description, a signal line constituted by the contact BP7 and the contact LP7 is referred to as a signal line HREQ. Similarly, a signal line composed of the contact point BP8 and the contact point LP8 is signal line HANS, a signal line composed of the contact point BP9 and the contact point LP9 is signal line HCLK, and a signal line composed of the contact point BP10 and the contact point LP10 is signaled. Called line HDAT.

  The contact BP11 and the contact BP12 are connected to the second power supply circuit 131 in the camera body 100. The second power supply circuit 131 has a driving system such as an actuator at the contact point BP12 and supplies the driving voltage of a circuit (focusing lens driving unit 212, blur correction lens driving unit 213, aperture driving unit 214, etc.) with relatively large power consumption. Supply. That is, the driving voltages of the focusing lens driving unit 212, the blur correction lens driving unit 213, and the aperture driving unit 214 are supplied from the contact BP12 and the contact LP12. The voltage value that can be supplied to the contact point BP12 has a range from the minimum voltage value to the maximum voltage value, all of which are larger than the voltage value range that can be supplied to the contact point BP1 (for example, The maximum voltage value that can be supplied to the contact point BP12 is several times the maximum voltage value that can be supplied to the contact point BP1). That is, the voltage value supplied to the contact point BP12 is a voltage value whose magnitude is different from the voltage value supplied to the contact point BP1. The voltage value that is normally supplied to the contact BP12 is a voltage value in the vicinity of an intermediate value between the maximum voltage value and the minimum voltage value that can be supplied to the contact BP12. As a result, the current supplied from the camera body 100 side to the interchangeable lens 200 side has a current value of about 10 mA to several A in the power-on state.

  The contact BP11 is a ground terminal corresponding to the drive voltage given to the contact BP12. That is, the contact BP11 and the contact LP11 are ground terminals corresponding to the drive voltage.

  In the following description, a signal line constituted by the contact BP11 and the contact LP11 is referred to as a signal line PGND. A signal line constituted by the contact BP12 and the contact LP12 is referred to as a signal line BAT. These contacts LP11, LP12, BP11, BP12 constitute a power supply system contact for supplying power from the camera body 100 side to the interchangeable lens 200 side.

  As is apparent from the magnitude relationship between the voltage value (current value) supplied to the contacts BP12 and LP12 and the voltage value (current value) supplied to the contacts BP1 and LP1, the voltages are supplied to the contacts. The difference between the maximum value and the minimum value of the current flowing through the contact point BP11 and the contact point LP11 serving as the ground terminals for each of the voltages is larger than the difference between the maximum value and the minimum value of the current flowing through the contact point BP2 and the contact point LP2. ing. This is because the power consumed by each drive unit having a drive system such as an actuator is larger than that of an electronic circuit such as the lens control unit 203 in the interchangeable lens 200 and it is not necessary to drive the driven member. This is because each drive unit does not consume power.

(Description of command data communication)
The lens control unit 203 controls the lens-side first communication unit 217 and receives control data from the body-side first communication unit 117 via the contacts LP3 to LP6, that is, the signal lines CLK, BDAT, LDAT, and RDY. Reception and transmission of response data to the body-side first communication unit 117 are performed in parallel at a predetermined first predetermined period (for example, 16 milliseconds in this embodiment). Hereinafter, details of communication performed between the lens-side first communication unit 217 and the body-side first communication unit 117 will be described.

  In the present embodiment, communication performed between the lens control unit 203 and the lens-side first communication unit 217 and the body control unit 103 and the body-side first communication unit 117 is referred to as “command data communication”. A transmission line composed of four signal lines (signal lines CLK, BDAT, LDAT, and RDY) used for command data communication is referred to as a first transmission line. A communication system for performing the command data communication is referred to as a “command data communication system”.

  FIG. 4 is a timing chart showing an example of command data communication. The body control unit 103 and the body-side first communication unit 117 first check the signal level of the signal line RDY at the start of command data communication (T1). The signal level of the signal line RDY indicates whether the lens-side first communication unit 217 can communicate. The lens control unit 203 and the lens-side first communication unit 217 output a signal of H (High) level from the contact LP6 when communication is not possible. That is, the signal level of the signal line RDY is set to H level. When the signal line RDY is at the H level, the body control unit 103 and the body-side first communication unit 117 do not start communication until the signal line RDY is at the L level. Also, the next processing during communication is not executed.

  If the signal line RDY is at L (Low) level, the body control unit 103 and the first body side communication unit 117 output the clock signal 401 from the contact point BP3. That is, the clock signal 401 is transmitted to the first lens side communication unit 217 via the signal line CLK. In synchronization with the clock signal 401, the body control unit 103 and the body side first communication unit 117 output a body side command packet signal 402, which is the first half of the control data, from the contact point BP4. That is, the body side command packet signal 402 is transmitted to the first lens side communication unit 217 via the signal line BDAT.

  When the clock signal 401 is output to the signal line CLK, the lens control unit 203 and the lens-side first communication unit 217 synchronize with the clock signal 401, and the lens-side command packet that is the first half of the response data from the contact LP5. The signal 403 is output. That is, the lens-side command packet signal 403 is transmitted to the first body-side communication unit 117 via the signal line LDAT.

  The lens control unit 203 and the lens side first communication unit 217 set the signal level of the signal line RDY to the H level in response to the completion of transmission of the lens side command packet signal 403 (T2). The lens control unit 203 starts a first control process 404 (described later) that is a process according to the content of the received body-side command packet signal 402.

  When the first control process 404 is completed, the lens control unit 203 notifies the lens side first communication unit 217 of the completion of the first control process 404. In response to this notification, the lens side first communication unit 217 outputs an L level signal from the contact LP6. That is, the signal level of the signal line RDY is set to L level (T3). The body control unit 103 and the first body side communication unit 117 output the clock signal 405 from the contact point BP3 in accordance with the change in the signal level. That is, the clock signal 405 is transmitted to the lens side first communication unit 217 via the signal line CLK.

  The body control unit 103 and the first body-side communication unit 117 output a body-side data packet signal 406 that is the latter half of the control data from the contact point BP4 in synchronization with the clock signal 405. That is, the body side data packet signal 406 is transmitted to the lens side first communication unit 217 via the signal line BDAT.

  Further, when the clock signal 405 is output to the signal line CLK, the lens control unit 203 and the lens side first communication unit 217 synchronize with the clock signal 405, and the lens which is the latter half of the response data from the contact LP5 receives the data packet signal. 407 is output. That is, the lens-side data packet signal 407 is transmitted to the first body-side communication unit 117 via the signal line LDAT.

  In response to the completion of transmission of the lens-side data packet signal 407, the lens control unit 203 and the lens-side first communication unit 217 set the signal level of the signal line RDY to the H level again (T4). The lens control unit 203 starts a second control process 408 (described later) that is a process according to the content of the received body-side data packet signal 406.

  Here, the first control process 404 and the second control process 408 performed by the lens control unit 203 will be described.

  For example, a case where the received body-side command packet signal 402 has a content requesting specific data on the interchangeable lens side will be described. As the first control process 404, the lens control unit 203 analyzes the content of the command packet signal 402 and executes a process of generating the requested specific data. Further, as the first control process 404, the lens control unit 203 uses the checksum data included in the command packet signal 402 to easily determine whether there is an error in the communication of the command packet signal 402 from the number of data bytes. The communication error check process to check is also executed. The specific data signal generated in the first control process 404 is output to the body side as a lens-side data packet signal 407. In this case, the body side data packet signal 406 output from the body side after the command packet signal 402 is a dummy data signal (including checksum data) that has no particular meaning for the lens side. In this case, the lens control unit 203 executes the communication error check process as described above using the checksum data included in the body side data packet signal 406 as the second control process 408.

  For example, a case where the received body-side command packet signal 402 is an instruction to drive a lens-side driven member will be described. For example, a case where the command packet signal 402 is an instruction to drive the focusing lens 210b and the received body side data packet signal 406 is the driving amount of the focusing lens 210b will be described. As the first control process 404, the lens control unit 203 analyzes the content of the command packet signal 402 and generates an acknowledgment signal indicating that the content has been understood. Furthermore, the lens control unit 203 also executes the communication error check process as described above using the checksum data included in the command packet signal 402 as the first control process 404. The acknowledge signal generated in the first control process 404 is output to the body side as a lens side data packet signal 407. In addition, as the second control process 408, the lens control unit 203 executes an analysis process of the contents of the body side data packet signal 406 and uses the checksum data included in the body side data packet signal 406 as described above. Execute the check process.

  When the second control process 408 is completed, the lens control unit 203 notifies the lens side first communication unit 217 of the completion of the second control process 408. Accordingly, the lens control unit 203 causes the lens side first communication unit 217 to output an L level signal from the contact LP6. That is, the signal level of the signal line RDY is set to L level (T5).

  If the received body-side command packet signal 402 is an instruction to drive a lens-side driven member (for example, a focusing lens) as described above, the lens control unit 203 sends a signal to the lens-side first communication unit 217. While the signal level of the line RDY is set to L level, the focusing lens driving unit 212 is caused to execute processing for driving the focusing lens 210b by the driving amount.

  The communication performed at the above-described time T1 to time T5 is one command data communication. As described above, in one command data communication, body control unit 103 and body side first communication unit 117 transmit body side command packet signal 402 and body side data packet signal 406 one by one. In other words, the body side command packet signal 402 and the body side data packet signal 406 together constitute one control data although it is divided and transmitted for convenience of processing.

  Similarly, in one command data communication, the lens control unit 203 and the lens side first communication unit 217 transmit the lens side command packet signal 403 and the lens side data packet signal 407 one by one. That is, the lens side command packet signal 403 and the lens side data packet signal 407 are combined to form one response data.

  As described above, the lens control unit 203 and the lens-side first communication unit 217 perform reception of control data from the body-side first communication unit 117 and transmission of response data to the body-side first communication unit 117 in parallel. And do it. The contact LP6 and the contact BP6 used for command data communication are contacts through which asynchronous signals (signal level of the signal line RDY / H (High) level or L (Low) level) that are not synchronized with other clock signals are transmitted. is there.

(Description of hotline communication)
The lens control unit 203 controls the lens side second communication unit 218 to transmit lens position data to the body side second communication unit 118 via the contacts LP7 to LP10, that is, the signal lines HREQ, HANS, HCLK, and HDAT. Send. Hereinafter, details of communication performed between the lens-side second communication unit 218 and the body-side second communication unit 118 will be described.

  In the present embodiment, communication performed between the lens control unit 203 and the lens-side second communication unit 218, and the body control unit 103 and the body-side second communication unit 118 is referred to as “hotline communication”. A transmission line composed of four signal lines (signal lines HREQ, HANS, HCLK, and HDAT) used for hot line communication is referred to as a second transmission line. A communication system for performing these hot line communications is referred to as a “hot line communication system”.

  FIG. 5 is a timing chart showing an example of hotline communication. The body control unit 103 of the present embodiment is configured to start hot line communication every second predetermined period (for example, 1 millisecond in the present embodiment). This period is shorter than the period for performing command data communication. FIG. 5A is a diagram illustrating a state in which hot line communication is repeatedly performed at predetermined intervals Tn. FIG. 5B shows a state in which a certain communication period Tx is expanded in hot line communication repeatedly executed. Hereinafter, the procedure of hotline communication will be described based on the timing chart of FIG.

  At the start of hot line communication (T6), body control unit 103 and body-side second communication unit 118 first output an L level signal from contact point BP7. That is, the signal level of the signal line HREQ is set to L level. The lens side second communication unit 218 notifies the lens control unit 203 that this signal has been input to the contact LP7. In response to this notification, the lens control unit 203 starts executing a generation process 501 that generates lens position data. The generation process 501 is a process in which the lens control unit 203 causes a focusing lens position detection unit (not shown) to detect the position of the focusing lens 210b and generates lens position data representing the detection result.

  When the lens control unit 203 completes the generation process 501, the lens control unit 203 and the lens-side second communication unit 218 output an L level signal from the contact LP8 (T7). That is, the signal level of the signal line HANS is set to the L level. The body control unit 103 and the body-side second communication unit 118 output the clock signal 502 from the contact BP9 in response to the input of this signal to the contact BP8. That is, a clock signal is transmitted to the lens side second communication unit 218 via the signal line HCLK.

  The lens control unit 203 and the second lens-side communication unit 218 output a lens position data signal 503 representing lens position data from the contact LP10 in synchronization with the clock signal 502. That is, the lens position data signal 503 is transmitted to the body-side second communication unit 118 via the signal line HDAT.

  When the transmission of the lens position data signal 503 is completed, the lens control unit 203 and the second lens side communication unit 218 output an H level signal from the contact LP8. That is, the signal level of the signal line HANS is set to the H level (T8). The body-side second communication unit 118 outputs an H-level signal from the contact LP7 in response to the input of this signal to the contact BP8. That is, the signal level of the signal line HREQ is set to H level (T9).

  The communication performed from time T6 to time T9 described above is one hot line communication. As described above, in one hot line communication, one lens position data signal 503 is transmitted by the lens control unit 203 and the second lens side communication unit 218. The contacts LP7, LP8, BP7, and BP8 used for hotline communication are contacts through which asynchronous signals that are not synchronized with other clock signals are transmitted. That is, the contacts LP7 and BP7 are contacts through which asynchronous signals (signal level HREQ signal level / H (High) level or L (Low) level) are transmitted, and the contacts LP8 and BP8 are asynchronous signals (signal line HANS). Signal level / H (High) level or L (Low) level).

  Note that the command data communication and the hotline communication can be executed simultaneously or partially in parallel. That is, one of the lens side first communication unit 217 and the lens side second communication unit 218 can communicate with the camera body 100 even when the other is communicating with the camera body 100. is there.

(Description of processing executed after power on)
When the user performs a power-on operation of the camera 1 (for example, an operation of turning on a power switch (not shown)), the lens control unit 203 (initialization control unit 223) executes an initialization process for each unit of the interchangeable lens 200. Similarly, the body control unit 103 executes initialization processing for each unit of the camera body 100.

  In this initialization process, the lens control unit 203 (initialization control unit 223) first initializes the lens-side first communication unit 217 and the lens-side second communication unit 218. Similarly, the body control unit 103 first initializes the body side first communication unit 117 and the body side second communication unit 118. Through these processes, data communication (command data communication and hot line communication) can be performed between the camera body 100 and the interchangeable lens 200.

  The lens control unit 203 (initialization control unit 223) starts initialization of a plurality of driven members included in the interchangeable lens 200 after initialization of each communication unit. The interchangeable lens 200 of the present embodiment includes a plurality of driven members (a focusing lens 210b, a shake correction lens 210c, and a diaphragm 211). After the camera 1 is turned on, the body control unit 103 and the lens control unit 203 perform normal control processing on these driven members until the predetermined initialization processing by the initialization control unit 223 is completed. Can not do it. Examples of normal control processing include transmission processing in the driven state by the driven state transmission unit 222 and driving processing by the drive control unit 123.

  The initialization control unit 223 according to the present embodiment sequentially performs initialization processing of each driven member in the order of the aperture 211, the shake correction lens 210c, and the focusing lens 210b. The camera body 100 (body control unit 103) cannot execute processing for handling these driven members until the initialization processing by the initialization control unit 223 is completed. For example, until initialization of the aperture 211 is completed, the camera body 100 (body control unit 103) cannot freely change the aperture diameter of the aperture 211, and thus cannot perform processing such as exposure control.

  In the present embodiment, the initialization status transmission unit 221 transmits initialization status data representing the initialization status of each driven member to the camera body 100 (initialization status reception unit 121) at predetermined intervals. The body control unit 103 reads the initialization status data received by the initialization status reception unit 121, and sequentially starts the control process for the driven members that have been initialized. For example, the drive control unit 123 does not execute the control process on the driven member whose initialization process data indicates that the initialization process has not been executed.

  FIG. 6 is a diagram illustrating a structure of information (data) representing an initialization state. When the initialization of each communication unit is completed, the body control unit 103 sends an initialization status request command (data) 50 shown in FIG. 6A from the body-side first communication unit 117 to the interchangeable lens 200 at predetermined intervals. Send. When receiving the initialization status request command (data) 50, the lens-side first communication unit 217 transmits initialization status information (data) 60 shown in FIG. 6B to the body-side first communication unit 117. That is, the initialization status transmission unit 221 uses the lens-side first communication unit 217 to transmit initialization status information (data) 60 indicating whether or not the execution of the initialization process has been completed for each of the plurality of driven members. It transmits to the body side 1st communication part 117 for every predetermined period (for example, 16 milliseconds). In the command data communication shown in FIG. 4, the initialization status request command (data) 50 corresponds to the body side command packet signal 402, and the initialization status information (data) 60 corresponds to the lens side data packet signal 407.

  Note that the area described as “N / A” in FIG. 6 is an area where data is not defined. In other words, any data may be contained in the portion described as “N / A”. The body-side first communication unit 117 and the lens-side first communication unit 217 simply ignore the data stored in this area.

  The initialization status request command (data) 50 shown in FIG. 6A is 2-byte data, and the lower 1 byte is an identification integer indicating that this data is the initialization status request command (data) 50. 51. In FIG. 6A, as an example, the identification integer 51 is set to a hexadecimal number of “60H”. However, if the initialization status request command (data) 50 can be identified, other communication is performed. Also good.

  The initialization status information (data) 60 shown in FIG. 6B is 2-byte data, and the lower 1 byte is an identification integer 61 indicating that this data is the initialization status information (data) 60. is there. The eighth bit is a flag 62 indicating whether or not the initialization process of the aperture 211 has been completed. When the initialization process of the aperture 211 is not completed, the initialization status transmission unit 221 transmits initialization status information (data) 60 in which the flag 62 is 0. Similarly, the 9th bit is a flag 63 indicating whether or not the initialization processing of the blur correction lens 210c is completed, and the 10th bit is whether or not the initialization processing of the focusing lens 210b is completed. This is a flag 64 representing the above.

  FIG. 7 is a time chart showing the execution order of the initialization process after the power is turned on. When a power-on operation is performed on the camera 1 at time T10, the body control unit 103 starts an initialization process 71 of each communication unit. Similarly, the lens control unit 203 (initialization control unit 223) also starts the initialization process 72 of each communication unit.

  When the initialization process 71 of each communication unit is completed, the body control unit 103 starts transmitting the initialization status request command (data) 50 described above. Thereafter, the body control unit 103 repeatedly transmits the initialization status request command (data) 50 at predetermined intervals until a control process 78 of the focusing lens 210b described later is completed (that is, in the period Ti).

  When the initialization processing 72 of each communication unit is completed, the lens control unit 203 (initialization control unit 223) starts the initialization processing 73 of the diaphragm 211. The initialization process 73 for the diaphragm 211 includes, for example, a process for determining the origin of a diaphragm actuator (not shown) that drives the diaphragm 211. In this process, the diaphragm actuator is driven, and the diaphragm 211 is driven (applying drive) to the diaphragm opening position (a position that comes into contact with a mechanical limit provided on the diaphragm opening side where the diaphragm is fully opened). The lens control unit 203 (initialization status transmission unit 221) transmits an initialization status request command (data) 50 from the camera body 100 until the initialization control unit 223 completes the execution of the initialization process 73 of the diaphragm 211. Each time the flag 62, the flag 63, and the flag 64 are all set to 0, the lens-side first communication unit 217 is caused to transmit initialization status information (data) 60 (to the camera body 100).

  In the present embodiment, there are two types of processing as initialization processing for the aperture 211. One of them is an initialization process 1 when a power-on operation (startup) is performed from a “power-off state” in which the power switch on the camera body 100 side is turned off. The other is an initialization process 2 in a case where the camera body is started from the “sleep state” in which the power switch on the camera body side remains ON but the camera body is shifted to the low power consumption state. Here, the position of the diaphragm 211 (control diaphragm position) before entering the sleep state is stored in the memory in the lens control unit 203 again when the sleep state is entered.

  The initialization process 1 is an origination process of a diaphragm actuator (not shown) that drives the diaphragm 211 as described above.

  On the other hand, in the initialization process 2, first the aperture actuator origination process as described above is performed, and then the aperture position (control aperture position) stored in the memory in the lens control unit 203 before the transition to the sleep state is performed. ) Is a process for driving and controlling the diaphragm 211.

  The body control unit 103 recognizes whether the camera body is in a power-off state or a sleep state, and is to perform the initialization process 1 when sending an initialization start instruction to the lens control unit 203? Information (parameter) indicating whether to perform the initialization process 2 is transmitted to the lens control unit 203. The lens-side control unit 203 performs either one of the initialization process 1 and the initialization process 2 based on this parameter.

  When the execution of the initialization process 73 of the aperture 211 is completed (that is, when the aperture 211 is initialized and normal aperture control is possible), the initialization status transmission unit 221 initializes the status information with the flag 61 set to 1. (Data) 60 is transmitted. When the body control unit 103 receives the initialization status information (data) 60 in which the flag 61 is 1, the body control unit 103 causes the drive control unit 123 to start executing the control process 74 for the diaphragm 211. For the control process of the aperture 211, for example, photometric calculation processing for obtaining photometric information necessary for performing exposure control based on the output from the image sensor 104 in the body, or the aperture for detecting the current position of the aperture 211 Location information acquisition processing is included. In addition, the aperture 211 control processing includes imaging aperture control processing for changing and controlling the aperture 211 to the imaging aperture value to be controlled at the time of imaging according to the imaging conditions such as the imaging mode and the above-mentioned photometric information (subject luminance). May be.

  On the other hand, the lens control unit 203 (initialization control unit 223) sequentially executes the initialization process 75 of the blur correction lens 210c and the initialization process 77 of the focusing lens 210b following the initialization process of the aperture 211. That is, the lens control unit 203 (initialization control unit 223) in the present embodiment completes the initialization process of the aperture 211 prior to the initialization process of other driven members. Each time these initialization processes are completed, the initialization status transmission unit 221 changes each flag (flag 62, flag 63) of the initialization status information (data) 60 to be transmitted from 0 to 1. After detecting the change of each flag (that is, the end of each initialization process), the body control unit 103 determines that the drive control unit 123 can perform control other than the initialization process according to each flag. The control process for the driven member (for example, the control process 76 of the shake correction lens 210c (for example, the centering process operation of the shake correction lens and the position information of the shake correction lens associated therewith) is not a command data communication instead of the above-described hotline communication system. Defocus information indicating the focus shift stored for the previous focusing process (for example, the data related to the focusing process stored in the in-body memory, for example) ) Is executed from the memory, and so on. When the initialization process of each driven member shown in FIG. 7 is completed, and further, all the processes of the control process of each driven member are completed, the camera 1 operates the operation member that instructs to start photographing (for example, the release button). If half-pressing operation / full-pressing operation is performed, shooting is possible through shooting preparation operations (focusing lens control, blur correction lens control, aperture control, etc.).

  The above-described initialization process 77 of the focusing lens 210b includes an origination process of a focusing lens actuator (not shown) that drives the focusing lens, similarly to the above-described initialization process 73 of the aperture 211. This origin finding process is a process for driving the focusing lens to a predetermined reference position (for example, the tele end position or the wide end position) of the focusing lens. Whether or not the focusing lens 210b has reached the reference position is detected by a sensor (a photo interrupter (not shown)) provided in the interchangeable lens, and the lens control unit 203 detects the focusing lens actuator based on the detection result of this sensor. Control to stop.

  Note that the initialization processing 77 of the focusing lens 210b is similar to the initialization processing 73 of the aperture 211 described above, and includes two types of processing (initialization processing 1 when the power is turned on (started up) from the “power OFF state”. There is an initialization process 2) when the camera body is activated from the “sleep state”. The contents of the initialization processes 1 and 2 are the same as the initialization process 73 of the aperture 211, and the only difference is whether the drive target is the aperture 211 or the focusing lens 210b. The description of is omitted.

  On the other hand, the above-described initialization process 75 of the shake correction lens 210c is a process of calculating a correction value for correcting the output of the position detection sensor for detecting the position of the shake correction lens 210c. In the present embodiment, a low-cost sensor (for example, a hall sensor) is used as a position detection sensor for the shake correction lens 210c. The output of such a position detection sensor varies depending on the ambient temperature. For this reason, a process for correcting the output of the position detection sensor in accordance with the ambient temperature is necessary so that proper position detection can be performed regardless of the ambient temperature. In the initialization process 75, as this correction process, a correction value based on the ambient temperature is calculated and stored in the memory of the lens control unit 203. The process up to storing the correction value is the initialization process 75. When the actual position of the shake correction lens 210c is detected, the output of the position detection sensor that detects the position of the shake correction lens 210c is corrected based on the correction value stored in the memory of the lens control unit 203. The ambient temperature is detected by a temperature sensor (not shown) provided on the circuit board in the lens.

  In the initialization process 75 in this embodiment, the origin correction process of the shake correction lens 210c (the process of driving the shake correction lens 210c to a predetermined reference position, for example, the center of the shake correction lens 210c is the optical axis of the interchangeable lens 200). The process of driving to match the center is not performed for energy saving.

(Explanation of driven state data)
FIG. 8 is a diagram showing the structure of driven state information (data). The driven state information (data) is information (data) representing the driven state of a plurality of driven members included in the interchangeable lens 200. The driven state transmitting unit 222 transmits the driven state information (data) 80 shown in FIG. 8 to the camera body 100 (driven state receiving unit 122) every predetermined cycle (for example, 1 millisecond). The driven state information (data) 80 is transmitted by hot line communication. That is, the driven state information (data) 80 is transmitted from the lens-side second communication unit 218 to the body-side second communication unit 118 via the second transmission path. The driven state transmission unit 222 starts transmission of the driven state of each driven member after the initialization of all the driven members is completed. That is, transmission of the driven state information (data) 80 is not started until the initialization processing of each driven member by the initialization control unit 223 is completed. In other words, in the driven state receiving unit 122 on the camera body 100 side, the initialization state information (data) 60 indicating that the initialization of all the driven members has been completed is received by the initialization state receiving unit 121. Later, by receiving a request signal to the interchangeable lens 200 using the above-described hotline communication system, reception of the driven state information (data) 80 is started. Here, a mechanism in which the driven state transmission unit 222 transmits initialization status data to the camera body 100 at predetermined intervals (every second cycle) will be described. The camera body 100 issues a signal (request signal) for requesting driven state information (data) to the interchangeable lens 200 every second period (for example, 1 msec). The driven state transmitter 222 of the interchangeable lens prepares for this request signal and responds with driven state information (data). With this mechanism, the driven state transmitting unit 222 transmits driven state information (data) to the camera body 100 at a second predetermined period.

  The driven state information (data) 80 is 4-byte data including position data 81 of the focusing lens 210b, aperture diameter data 82 of the aperture 211, and position data 83 of the shake correction lens 210c. The position data 81 of the focusing lens 210b is a 1-byte integer, and values from 0 to 255 correspond to each position from the closest position to the infinity position. Similarly, the aperture diameter data 82 of the diaphragm 211 is an integer of 1 byte, and a value of 0 to 255 corresponds to each position from the open diaphragm (maximum aperture diameter) to the minimum diaphragm (minimum aperture diameter). The position data 83 of the shake correction lens 210c is data obtained by combining two integers of 1 byte, and the position of the shake correction lens 210c in a plane perpendicular to the optical axis of the imaging optical system 210 is 0 to 0 in the X-axis direction. The value up to 255 corresponds to the value from 0 to 255 in the Y-axis direction.

  The body control unit 103 refers to the driven state data 80 received by the driven state receiving unit 122 to obtain the current driven state of each driven member. Then, based on the driven state obtained here, the drive control unit 123 performs drive control. For example, when driving the focusing lens 210b, it is determined by referring to the driven state data 80 whether or not the focusing lens 210b has been driven to a target position.

(Description of processing from power-on operation until shooting is possible)
FIG. 9 is a flowchart showing processing from the power-on operation until the photographing becomes possible. The left side of FIG. 9 shows processing executed by the body control unit 103, and the right side of FIG. 9 shows processing executed by the lens control unit 203. First, the processing executed by the body control unit 103 will be described.

  In step S100, the body control unit 103 receives a power-on operation by the user. In step S <b> 110, the body control unit 103 executes initialization processing of the body side first communication unit 117 and the body side second communication unit 118. In step S <b> 120, the body control unit 103 outputs a predetermined lens activation signal to the interchangeable lens 200 via the contact of the holding unit 102. In step S130, the body control unit 103 causes the body-side first communication unit 117 to transmit a predetermined initialization start instruction.

  In step S140, the body control unit 103 determines whether a predetermined period (for example, 16 milliseconds) has elapsed since the execution of step S130. The body control unit 103 repeats the process of step S140 until a predetermined period elapses. If the predetermined period has elapsed, the process proceeds to step S150. In step S150, the body control unit 103 transmits an initialization status request command (data) 50 to the interchangeable lens 200. In step S160, the initialization status receiving unit 121 receives initialization status information (data) 60. In step S170, the body control unit 103 refers to the initialization status information (data) 60 received in step S160, and determines whether or not the initialization status has changed from the previously received initialization status information (data) 60. . If the initialization status has not changed, the process proceeds to step S140 and waits for a predetermined period to elapse from the execution of step S170. On the other hand, if the initialization status has changed, the process proceeds to step S180. In step S180, the drive control unit 123 executes a predetermined control process on the driven member whose initialization status has changed. In step S190, the body control unit 103 determines whether or not initialization of all the driven members has been completed. If uninitialized driven members remain, the process returns to step S140 and waits for a predetermined period to elapse from the execution of step S190. On the other hand, if initialization of all the driven members has been completed, the process proceeds to step S200, and the camera body 100 is shifted to a photographing enabled state.

  Next, processing executed by the lens control unit 203 will be described. In step S <b> 210, a lens activation signal is input from the camera body 100. The lens control unit 203 starts the activation process in response to this signal. In step S220, the initialization control unit 223 executes initialization processing of the lens side first communication unit 217 and the lens side second communication unit 218. In step S <b> 230, the lens control unit 203 receives an initialization start instruction from the camera body 100. In step S240, the initialization control unit 223 sequentially starts the initialization process of each driven member. The initialization control unit 223 first starts the initialization process of the aperture 211, and when the initialization process is completed, the initialization process of other driven members is sequentially started. As described above, the initialization control unit 223 executes only one initialization process at a time.

  In step S250, the lens control unit 203 determines whether an initialization status request command (data) 50 has been received from the camera body 100. The lens control unit 203 repeats step S250 until an initialization status request command (data) 50 is received. When the initialization status request command (data) 50 is received, the process proceeds to step S260. In step S260, the initialization status transmission unit 221 transmits initialization status information (data) 60 to the camera body 100. In step S270, the lens control unit 203 determines whether all the flags of the initialization status information (data) 60 transmitted in step S260 immediately before are all 1. If a negative determination is made in step S270, the process proceeds to step S250. On the other hand, if the initialization status information (data) 60 in which all the flags are 1 is transmitted, the process proceeds to step S280. In step S280, the lens control unit 203 shifts the interchangeable lens 200 to a photographing enabled state.

According to the camera system according to the first embodiment described above, the following operational effects can be obtained.
(1) The initialization control unit 223 executes a predetermined initialization process for each of the plurality of driven members. The initialization status transmission unit 221 transmits initialization status information (data) indicating whether or not the initialization process has been completed for each of the plurality of driven members to the camera body 100. Since the initialization status is transmitted from the interchangeable lens 200 to the camera body 100 in this way, the time required for detecting the completion of the initialization of the interchangeable lens can be shortened.

  Further, according to the present embodiment, the initialization status information (data) is sent via the first transmission path (command data communication system) to a predetermined cycle (request issued from the camera body side at the first predetermined cycle). In response to the command, for example, it is transmitted to the camera body 100 every 16 msec). As described above, since the initialization status is periodically transmitted from the interchangeable lens 200 to the camera body 100 at a predetermined cycle, the time required for detecting the completion of the interchangeable lens initialization can be shortened.

  In addition, the driven state transmitting unit 222, after the initialization of each driven member, completes the driven state data indicating the driven state of the driven member via the second transmission path (hotline communication system). It transmits to the camera body 100 for every period. Since it did in this way, the camera body 100 can know the state of a to-be-driven member immediately immediately after completion of an initialization process.

(2) The initialization control unit 223 completes the initialization process of the diaphragm 211 prior to the initialization process of other driven members. The aperture member initialization process in this embodiment is a process of setting the aperture 211 to either the aperture opening (initialization process 1) or the photographing aperture opening (initialization process 2) stored before sleep. The aperture 211 is initially set to a metering preparation state corresponding to the situation (open metering or aperture metering to the photographing aperture). Since this is done, the camera body can start preparation for photometric operation (such as the above-mentioned photometric calculation processing based on the image sensor output) without waiting for initialization of other driven members, and can shoot Can be shortened.

(3) The initialization status transmission unit 221 of the interchangeable lens 200 transmits initialization status data 60 indicating the initialization status of the plurality of driven members to the camera body 100 at predetermined intervals. Since it did in this way, the camera body 100 can grasp | ascertain the condition for every to-be-driven member reliably each time, and can perform the preparatory operation | movement on the body side according to it, As a result, it will be in a photography possible state. Can be shortened.

(4) The initialization control unit 223 executes only one initialization process for a plurality of driven members simultaneously in a predetermined order. Since it did in this way, it becomes possible to always keep the execution completion order of the initialization process of each driven member constant, and control becomes easy.

(5) The driven state receiving unit 122 receives the initialization status data 60 indicating that the initialization of the driven member has been received by the initialization status receiving unit 121, and then indicates the driven state of the driven member. Start receiving. Since it did in this way, the inaccurate driven state is not received from the uninitialized driven member.

(6) The drive control unit 123 does not execute the predetermined control process on the driven member that is indicated by the initialization status data 60 that the execution of the initialization process is incomplete. Since it did in this way, inappropriate drive control will not be performed with respect to the uninitialized driven member.

(Second Embodiment)
The camera system according to the second embodiment of the present invention has the same configuration as the camera system according to the first embodiment. However, the order (procedure) in which the initialization control unit 223 performs the initialization processing of the plurality of driven members is different from that of the first embodiment. In the second embodiment, the same reference numerals are used to indicate the same contents as in the first embodiment.

  FIG. 10 is a time chart showing the execution order of the initialization process after the power is turned on. The initialization control unit 223 according to this embodiment executes the initialization process 72 of each communication unit, and then executes the initialization process of a plurality of driven members in parallel. That is, the initialization process 73 for the aperture 211, the initialization process 75 for the shake correction lens 210c, and the initialization process 77 for the focusing lens 210b are started simultaneously. These initialization processes have different execution times, and the body control unit 103 starts executing the driven member control process in order from the driven member that has been initialized. For example, as shown in FIG. 10, when the aperture initialization process 73 is ended first, the execution of the aperture control process 74 is started accordingly. Then, when the execution of the aperture control process 74 is completed, the process waits until the initialization process of other driven members is completed. Then, each time the initialization process is completed, a corresponding control process (for example, the shake correction lens control process 76 or the focusing lens control process 78) is executed.

  Note that the initialization processes 73 and 77 include two types of processes (a process at the time of startup from the “power OFF state” and a process at the time of startup from the “sleep state”). This is the same as the embodiment.

  The operation flow of the second embodiment is substantially the same as the operation flow shown in FIG. In FIG. 9, the difference from the operation flow in the first embodiment is that, in the second embodiment, the initialization control unit 223 “starts simultaneously” the initialization processing of each driven member in step S240.

According to the camera system according to the second embodiment described above, the following functions and effects can be obtained in addition to the functions and effects obtained by the camera system according to the first embodiment.
(1) The initialization control unit 223 starts executing the initialization process for a plurality of driven members simultaneously. As a result, since a plurality of initialization processes can be performed in parallel, the time required to complete all the initializations can be shortened, and accordingly, the time until the photographing is possible can be shortened.

(2) The initialization control unit 223 starts to execute initialization processing for a plurality of driven members simultaneously. Each time the initialization process is completed for each driven member, the interchangeable lens 200 transmits information indicating that fact to the camera body side. As a result, the camera body can quickly know the driven member that has been initialized, and the camera body side can start shooting preparations accordingly, further shortening the time until the camera is ready for shooting. It becomes possible to do.

  The following modifications are also within the scope of the present invention, and one or a plurality of modifications can be combined with the above-described embodiment.

(Modification 1)
In each embodiment described above, the driven state transmitting unit 222 does not transmit the driven state until the initialization of all the driven members is completed. Alternatively, the driven state may be sequentially transmitted from the driven member that has been initialized. For example, the driven state data 80 is variable length data, and only information related to the aperture diameter of the diaphragm 211 can be transmitted. After the initialization of the diaphragm 211 is completed, transmission of the driven state of the diaphragm 211 is started. You may do it.

(Modification 2)
The driven member is not limited to the above-described diaphragm, focusing lens, and blur correction lens. Further, the initialization order of the driven members is not limited to the order shown in the above-described embodiments.

(Modification 3)
In the interchangeable lens 200 of the above embodiment (FIG. 8), the driven state information of a plurality of driven parts is transmitted as the driven state information of the driven member that communicates to the camera body side using the hotline communication system. It is configured to do. However, the present invention is not limited to transmitting state information of a plurality of driven members, and may be configured to transmit information indicating the driven state of any one driven member.

(Modification 4)
In each of the embodiments described above, the interchangeable lens 200 is configured to transmit the initialization status data 60 to the camera body 100 at a first predetermined period using a command data communication system. However, until the initialization process on the interchangeable lens 200 side is completed, it may be devised to quickly notify the camera body of the change in the state of the initialization process. For example, the communication cycle of the command data communication system may be advanced until the initialization processing of all the driven members of the interchangeable lens 200 is completed. Specifically, the communication cycle of the command data communication system on the camera body 100 side and the interchangeable lens 200 side described above may be controlled to be earlier than the first predetermined cycle described above. Thereby, the camera body 100 can quickly know the completion of the initialization process of each driven member, and can shorten the period until the preparation for photographing and the photographing.

(Modification 5)
In the initialization process 75 of the shake correction lens 210c in each of the above-described embodiments, the process for driving the shake correction lens 210c to the reference position (for example, the center position of the shake correction lens 210c is made to coincide with the optical axis center of the photographing lens 200). , Processing for driving the shake correction lens 210c) may be performed. For example, when the battery level on the camera body side is sufficient, such origin correction processing of the shake correction lens 210c may be added to the initialization processing 75.

(Modification 6)
In the second embodiment, the three initialization processes 73, 75, and 77 are started simultaneously. However, the present invention is not limited to this, and only two initialization processes are started at the same time, and the remaining initialization processes are performed. May be configured to start at different timings.

(Modification 7)
In the above embodiment, every time the state of the initialization process changes (every time the initialization process is completed), information indicating that is sent to the camera body side. This method is also possible. For example, until the initialization process for all the driven members to be initialized is completed, the interchangeable lens side indicates that the initialization process has not been completed (for example, all initialization processes have not been completed). Information indicating completion, for example, data in which the flags 62 to 63 of the initialization status data 60 in FIG. 6 are all “0”) is sent. When the initialization processing of all the driven members is completed, information indicating that (information indicating that all initialization processing has been completed, specifically, the flags 62 to 62 of the initialization status data 60 in FIG. 6). Data in which 63 is all “1”) is sent. Even with such a configuration, the interchangeable lens can notify the camera body to that effect when all the initialization processes are completed.

  As long as the characteristics of the present invention are not impaired, the present invention is not limited to the above-described embodiments, and other forms conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention. .

DESCRIPTION OF SYMBOLS 1 ... Camera, 100 ... Camera body, 101 ... Lens mount, 102 ... Holding part, 103 ... Body control part, 117 ... Body side 1st communication part, 118 ... Body side 2nd communication part, 121 ... Initialization condition receiving part 122: Drive state receiving unit, 123: Drive control unit, 200 ... Interchangeable lens, 201 ... Lens mount, 202 ... Holding unit, 203 ... Lens control unit, 210 ... Imaging optical system, 210b ... Focusing lens, 210c ... Shake correction lens, 211 ... stop, 212 ... focusing lens drive unit, 213 ... blur correction lens drive unit, 214 ... stop drive unit, 217 ... first lens side communication unit, 218 ... second lens side communication unit, 221 ... initial stage ... Transmission state transmission unit, 222... Driven state transmission unit, 223... Initialization control unit

Claims (16)

An interchangeable lens attached to the camera body,
A driven member whose position changes upon receiving a driving force;
An initialization unit that controls an initialization process for the driven member;
A first contact for transmitting position information regarding the position of the driven member driven by the driving force to the camera body;
Wherein for transmitting initialization information indicating the status of the initialization process of the driven member to the camera body, have a, a different second contact from the first contact,
The interchangeable lens in which the position information is transmitted at a faster cycle than the initialization information . An interchangeable lens attached to the camera body,
A driven member whose position changes upon receiving a driving force;
An initialization unit that controls an initialization process for the driven member;
A first transmitter that transmits position information regarding the position of the driven member to the camera body via a first transmission path;
Wherein said initialization information indicating the status of the initialization process of the driven member, have a, a second transmission unit that transmits to the camera body via a different second transmission line of said first transmission line ,
The interchangeable lens in which the position information is transmitted at a faster cycle than the initialization information . The interchangeable lens according to claim 2,
The initialization unit is an interchangeable lens that controls initialization processing for the driven member after initialization processing for the first transmission unit and the second transmission unit. A interchangeable lens having a driven member position is changed by a driving force,
A process related to initialization is performed on the driven member,
Position information on the position of the driven member is transmitted to the camera body via the first contact;
Initialization information indicating the status of the process related to the initialization of the driven member is transmitted to the camera body via a second contact different from the first contact ,
The interchangeable lens in which the position information is transmitted at a faster cycle than the initialization information . An interchangeable lens attached to the camera body,
A plurality of driven members whose positions are changed by receiving a driving force;
An initialization unit for controlling an initialization process for each of the plurality of driven members;
A first contact for transmitting position information related to a position of at least one driven member of the plurality of driven members to the camera body;
Wherein the plurality of initialization information indicating individual status of the initialization process for each of the driven member, for transmitting to said camera body, have a, a different second contact from the first contact,
The interchangeable lens in which the position information is transmitted at a faster cycle than the initialization information . An interchangeable lens attached to the camera body,
A plurality of driven members whose positions are changed by receiving a driving force;
An initialization unit for controlling an initialization process for each of the plurality of driven members;
A first transmission unit configured to transmit position information regarding the position of at least one driven member among the plurality of driven members to the camera body via a first transmission path;
Second transmission for transmitting initialization information individually indicating the status of the initialization process for each of the plurality of driven members to the camera body via a second transmission path different from the first transmission path. and parts, the possess,
The interchangeable lens in which the position information is transmitted at a faster cycle than the initialization information . The interchangeable lens according to claim 6,
The initialization unit is an interchangeable lens that controls initialization processing for the plurality of driven members after initialization processing for the first transmission unit and the second transmission unit. A interchangeable lens having a plurality of driven member position is changed by a driving force,
A process related to initialization is performed on each of the plurality of driven members,
Transmitting positional information related to the position of at least one driven member of the plurality of driven members to the camera body via the first contact;
Initialization information individually indicating the status of the processing related to the initialization for each of the plurality of driven members is transmitted to the camera body via a second contact different from the first contact ;
The interchangeable lens in which the position information is transmitted at a faster cycle than the initialization information . In the interchangeable lens as described in any one of Claims 5-7,
The initialization unit is an interchangeable lens that performs initialization processing of the plurality of driven members in parallel. The interchangeable lens according to claim 8 or 9,
An interchangeable lens that starts executing initialization processing of the plurality of driven members simultaneously. In the interchangeable lens according to any one of claims 5 to 10,
One of the plurality of driven members is a diaphragm,
An interchangeable lens that completes the aperture initialization process prior to the initialization process of other driven members. The interchangeable lens according to claim 11,
An interchangeable lens that transmits the initialization information indicating that initialization processing of driven members other than the aperture is not completed until the aperture initialization processing is completed. In the interchangeable lens as described in any one of Claims 5-7,
The initialization unit is an interchangeable lens that performs initialization processing of the plurality of driven members one by one in a predetermined order. An attachment portion to which an interchangeable lens having a plurality of driven members whose driven positions change by receiving a driving force is detachably attached;
A first receiver that receives position information about the position of at least one driven member of the plurality of driven members from the interchangeable lens via a first contact;
Initialization information indicating the status of initialization processing performed by the interchangeable lens for each of the plurality of driven members for each of the driven members is transmitted via the second contact different from the first contact. A second receiving unit for receiving from ,
The camera body is a camera body that receives the position information at a cycle faster than the initialization information . The camera body according to claim 14 ,
A control unit for executing a predetermined control process on each of the plurality of driven members;
The control unit is a camera body that cannot execute the control process on a driven member that is indicated by the initialization information that the execution of the initialization process is incomplete. The camera body according to claim 15 ,
One of the plurality of driven members is a diaphragm,
The control unit is a camera body that causes the diaphragm to perform an aperture control process that is the predetermined control process.

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