JP7136158B2 - Accessories and interchangeable lenses - Google Patents

Description

The present invention relates to accessories and interchangeable lenses.

A camera system is known that includes a camera body and an interchangeable lens detachable from the camera body. For example, Patent Literature 1 describes a camera system that includes a camera body and a camera head, and initializes the camera head.

Japanese Patent Application Laid-Open No. 2006-319631

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

An accessory according to a first aspect of the present invention is an accessory that can communicate with a camera body, and includes a first driven member that receives a driving force and changes its state, and a second driven member that receives a driving force and changes its state. an initialization section for executing initialization processing on the first driven member and the second driven member; and when the initialization processing for the first driven member is completed, and a control unit for starting execution of the control process for the first driven member regardless of whether the initialization process for the second driven member has been completed.
The accessory according to the first aspect is the interchangeable lens according to the second aspect of the invention.

1 is a perspective view showing a lens-interchangeable camera system to which the present invention is applied; FIG. 1 is a sectional view showing a lens-interchangeable camera system to which the present invention is applied; FIG. 4 is a schematic diagram showing details of holding portions 102 and 202. FIG. 4 is a timing chart showing an example of command data communication; 4 is a timing chart showing an example of hotline communication; FIG. 10 is a diagram showing the structure of initialization status data; 4 is a time chart showing the execution order of initialization processing after power-on; FIG. 4 is a diagram showing the structure of driven state data; 10 is a flow chart showing processing from a power-on operation until shooting becomes possible. 4 is a time chart showing the execution order of initialization processing after power-on;

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

A camera body 100 is provided with a lens mount 101 to which an interchangeable lens 200 is detachably attached. In the vicinity of the lens mount 101 of the camera body 100 (on the inner peripheral side of the lens mount 101), a holding portion (electrical connection part) 102 is provided. The holding portion 102 is provided with a plurality of contacts.

The interchangeable lens 200 is also 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. In the vicinity of the lens mount 201 of the interchangeable lens 200 (on the inner peripheral side of the lens mount 201), there is a holding portion (for electrical connection) that holds the contact while 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 section 102 provided with a plurality of contacts is electrically and physically connected to the holding section 202 provided with a plurality of contacts. Both holding portions 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 .

Behind the lens mount 101 inside the camera body 100, an imaging element 104 such as a CMOS or CCD is provided. A button 107 serving as an input device is provided above the camera body 100 . The user uses an input device such as the button 107 to issue a photographing instruction or a photographing condition setting instruction to the camera body 100 .

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

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

The first lens side communication section 217 and the second lens side communication section 218 exchange data with the camera body 100 via respective communication contacts of the holding sections 102 and 202 . The first lens side communication unit 217 and the second lens side communication unit 218 are communication interfaces on the interchangeable lens 200 side. The lens control unit 203 uses these communication interfaces to perform various communications (hotline communication, command data communication) to be described later with the camera body 100 (body control unit 103 to be described later).

The focusing lens driving section 212 has an actuator such as a stepping motor, and drives the focusing lens 210 b according to the signal input to the focusing lens driving section 212 . Similarly, the blur correction lens drive section 213 and the diaphragm drive section 214 each have an actuator such as a voice coil motor, and drive the blur correction lens 210c and the diaphragm 211, respectively, according to input signals.

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

Note that the interchangeable lens 200 may include driven members other than the above-described driven members (the focusing lens 210b, the blur correction lens 210c, and the diaphragm 211). For example, similar to the focusing lens 210b, a zoom lens is provided as a member movable in the optical axis direction of the imaging optical system 210, and a mechanism for electrically driving the zoom lens (a so-called power zoom mechanism) is provided as an interchangeable lens. 200 may be provided.

A ROM 215 is a non-volatile storage medium, and prestores predetermined control programs and the like executed by the lens control unit 203 . A RAM 216 is a volatile storage medium, and is used by the lens control unit 203 as a storage area for various data.

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

The initialization control section 223 executes predetermined initialization processing for each of the plurality of driven members described above. The initialization status transmission unit 221 transmits initialization status data representing the status of the initialization process (for example, status data representing whether the execution of the initialization process has been completed or not) for each of the plurality of driven members, It is transmitted to the camera body 100 at predetermined intervals via the first transmission line (detailed later). The driven state transmission unit 222 transmits the driven state data representing the driven states of the plurality of driven members described above to the camera at predetermined intervals via a second transmission line (described in detail later) different from the first transmission line. Send to body. Here, the mechanism by which the initialization status transmission unit 221 transmits the 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 initialization processing is received from the interchangeable lens 200 . The initialization status transmission unit 221 of the interchangeable lens responds with prepared initialization status data in response to this request command. With such a mechanism, the initialization status transmission unit 221 transmits the initialization status data to the camera body 100 at predetermined intervals.

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 in front of the image sensor 104 . 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 section 103 that controls each section of the camera body 100 is provided. The body control unit 103 is composed of a microcomputer, a RAM, peripheral circuits, and the like (not shown).

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

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

The body control unit 103 has an initialization status reception unit 121, a driven state reception unit 122, and a drive control unit 123 in software form. Each of these functional units is implemented in software by body control unit 103 executing a predetermined control program. Initialization status reception section 121 receives the initialization status data transmitted by initialization status transmission section 221 . The driven state receiving section 122 receives the driven state data representing the driven states of the plurality of driven members transmitted from the driven state transmitting section 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 portions 102 and 202)
FIG. 3 is a schematic diagram showing details of the holding portions 102 and 202. As shown in FIG. Note that the holding portion 102 is arranged on the right side of the lens mount 101 in FIG. 3 following the actual mount structure. That is, the holding portion 102 of the present embodiment is arranged at a location recessed from 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 reason why the holding portion 202 is arranged on the right side of the lens mount 201 is that the holding portion 202 of the present embodiment is arranged at a position protruding from the mount surface of the lens mount 201 of the interchangeable lens 200. represent. Since the holding portion 102 and the holding portion 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 to mount and couple the camera body 100 and the interchangeable lens 200, The holding portion 102 and the holding portion 202 are connected, and the electrical contacts provided on both holding portions are also connected. Since such a mount structure is well known, further explanation and illustration are omitted.

As shown in FIG. 3, the holding portion 102 has 12 contacts BP1 to BP12. The holding portion 202 also has 12 contacts LP1 to LP12 corresponding to the 12 contacts described above.

The contact BP1 and the contact BP2 are connected to the first power supply circuit 130 inside the camera body 100 . The first power supply circuit 130 has a drive system such as an actuator at the contact point BP1, and the interchangeable lens excluding circuits that consume relatively large power (focusing lens drive unit 212, blur correction lens drive unit 213, aperture drive unit 214, etc.). 200 supplies the operating voltage for each section. In other words, the contact BP1 and the contact LP1 supply the operating voltages of the parts in the interchangeable lens 200 excluding the drive parts described above. The voltage value that can be supplied to this contact BP1 has a range from the minimum voltage value to the maximum voltage value (for example, a voltage range in the 3V range). is a voltage value near the middle value of . As a result, the current value supplied from the camera body 100 side to the interchangeable lens 200 side is within the range of approximately several tens of mA to several hundred mA when the power is ON.

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

In the following description, the signal line formed by the contact BP1 and the contact LP1 is referred to as signal line V33. A signal line formed by the contact BP2 and the contact LP2 is called a signal line GND. These contacts LP1, LP2, BP1, and BP2 constitute power system contacts 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 first body-side communication section 117. FIG. Contacts LP3, LP4, LP5, and LP6 on the interchangeable lens 200 side corresponding to these contacts are connected to the lens side first communication section 217. FIG. The first body-side communication unit 117 and the first lens-side communication unit 217 exchange data with each other using these contacts (communication system contacts). The details of communication performed by the first body-side communication unit 117 and the first lens-side communication unit 217 will be described later.

In the following description, the signal line formed by the contact BP3 and the contact LP3 will be referred to as signal line CLK. Similarly, the signal line formed by the contacts BP4 and LP4 is the signal line BDAT, the signal line formed by the contacts BP5 and LP5 is the signal line LDAT, and the signal line formed by the contacts BP6 and LP6 is the signal line. Call the line RDY.

The contacts BP7, BP8, BP9, and BP10 are connected to the second body side communication section 118. FIG. Contacts LP7, LP8, LP9, and LP10 on the interchangeable lens 200 side corresponding to these contacts are connected to the lens side second communication section 218. FIG. The second lens side communication unit 218 uses these contacts (communication system contacts) to transmit data to the second body side communication unit 118 . The details of communication performed by the second body side communication section 118 and the second lens side communication section 218 will be described later.

In the following description, the signal line formed by the contact BP7 and the contact LP7 is referred to as signal line HREQ. Similarly, the signal line formed by the contacts BP8 and LP8 is the signal line HANS, the signal line formed by the contacts BP9 and LP9 is the signal line HCLK, and the signal line formed by the contacts BP10 and LP10 is the signal line. Call the line HDAT.

The contact BP11 and the contact BP12 are connected to the second power supply circuit 131 inside the camera body 100 . The second power supply circuit 131 applies a drive voltage to a contact BP12 to a circuit having a drive system such as an actuator and consuming relatively large power (focusing lens drive section 212, blur correction lens drive section 213, aperture drive section 214, etc.). supply. That is, drive voltages for the focusing lens drive section 212, the blur correction lens drive section 213, and the diaphragm drive section 214 are supplied from the contacts BP12 and LP12. The voltage value that can be supplied to the contact BP12 has a range from the minimum voltage value to the maximum voltage value. , the maximum voltage value that can be supplied to the contact BP12 is about several times the maximum voltage value that can be supplied to the contact BP1). That is, the voltage value supplied to the contact BP12 is a voltage value different in magnitude from the voltage value supplied to the contact BP1. The voltage value normally supplied to the contact BP12 is a voltage value in the vicinity of the 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 when the power is ON.

The contact BP11 is a ground terminal corresponding to the drive voltage applied 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, the signal line formed by the contact BP11 and the contact LP11 will be referred to as signal line PGND. A signal line formed by the contact BP12 and the contact LP12 is called a signal line BAT. These contacts LP11, LP12, BP11, and BP12 constitute power system contacts for supplying power from the camera body 100 side to the interchangeable lens 200 side.

As is clear 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 difference between the maximum and minimum values of the currents flowing through the contacts BP11 and LP11, which are the ground terminals for the voltages applied to the respective voltages, is greater than the difference between the maximum and minimum values of the currents flowing through the contacts BP2 and LP2. ing. This is because the power consumed by each driving unit having a driving system such as an actuator is larger than that of the electronic circuit such as the lens control unit 203 in the interchangeable lens 200, and when there is no need to drive the driven member. is due to the fact that each drive does not consume power.

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

In this embodiment, communication between the lens control section 203 and the first lens side communication section 217 and the body control section 103 and the first body side communication section 117 is called "command data communication". Also, a transmission line composed of four signal lines (signal lines CLK, BDAT, LDAT, and RDY) used for command data communication is called a first transmission line. A communication system for performing these command data communications is called a "command data communication system".

FIG. 4 is a timing chart showing an example of command data communication. At the start of command data communication (T1), body control section 103 and first body side communication section 117 first confirm the signal level of signal line RDY. The signal level of the signal line RDY indicates whether or not the first lens-side communication unit 217 can communicate. When the lens control unit 203 and the first lens side communication unit 217 cannot communicate with each other, they output an H (High) level signal from the contact point LP6. That is, the signal level of the signal line RDY is set to H level. When the signal line RDY is at H level, body control section 103 and first body side communication section 117 do not start communication until this becomes L level. Also, the next process during communication is not executed.

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

Further, when the clock signal 401 is output to the signal line CLK, the lens control unit 203 and the first lens side communication unit 217 transmit the lens side command packet, which is the first half of the response data, from the contact point LP5 in synchronization with the clock signal 401. A 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 first lens side communication unit 217 change the signal level of the signal line RDY to 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) which is a process according to the content of the received body-side command packet signal 402 .

When the first control processing 404 is completed, the lens control unit 203 notifies the lens side first communication unit 217 of the completion of the first control processing 404 . In response to this notification, the first lens side 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). Body control unit 103 and first body-side communication unit 117 output clock signal 405 from contact BP3 in response to this change in signal level. That is, the clock signal 405 is transmitted to the first lens side communication section 217 via the signal line CLK.

In synchronization with this clock signal 405, body control section 103 and first body side communication section 117 output body side data packet signal 406, which is the latter half of the control data, from contact BP4. That is, the body-side data packet signal 406 is transmitted to the first lens-side 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 first lens side communication unit 217 synchronize with the clock signal 405, and the lens, which is the second half of the response data, is transmitted from the contact LP5 to the data packet signal. 407 is output. That is, the lens side data packet signal 407 is transmitted to the first body side communication section 117 via the signal line LDAT.

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

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

For example, a case where the received body-side command packet signal 402 requests specific data on the interchangeable lens side will be described. As first control processing 404, the lens control unit 203 analyzes the content of the command packet signal 402 and executes processing for generating the requested specific data. Furthermore, as first control processing 404, the lens control unit 203 uses the checksum data included in the command packet signal 402 to determine whether there is an error in the communication of the command packet signal 402 based on the number of data bytes. It also executes a communication error check process that checks The specific data signal generated by the first control processing 404 is output to the body side as the 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 .

Also, for example, a case where the received body-side command packet signal 402 is an instruction to drive a driven member on the lens side will be described. For example, a case where the command packet signal 402 is a drive instruction for the focusing lens 210b and the received body side data packet signal 406 is a drive amount for the focusing lens 210b will be described. As first control processing 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 communication error check processing as described above using the checksum data included in the command packet signal 402 as the first control processing 404 . The acknowledgment signal generated by this first control processing 404 is output to the body side as the lens side data packet signal 407 . Further, as second control processing 408, the lens control unit 203 executes processing for analyzing the content of the body-side data packet signal 406, and detects communication errors as described above using the checksum data included in the body-side data packet signal 406. Execute check processing.

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

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

The communication performed from time T1 to time T5 described above is one command data communication. As described above, in one command data communication, body control section 103 and first body side communication section 117 transmit one body side command packet signal 402 and one body side data packet signal 406 respectively. That is, the body-side command packet signal 402 and the body-side data packet signal 406 constitute one piece of control data, although they are divided into two for the convenience of processing and transmitted.

Similarly, in one command data communication, the lens control section 203 and the first lens side communication section 217 transmit one lens side command packet signal 403 and one lens side data packet signal 407 respectively. In other words, the lens-side command packet signal 403 and the lens-side data packet signal 407 together form one response data.

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

(Explanation 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. The details of communication between the second lens side communication unit 218 and the second body side communication unit 118 will be described below.

In the present embodiment, communication between the lens control section 203 and the second lens side communication section 218 and the body control section 103 and the second body side communication section 118 is called "hotline communication". Also, a transmission line composed of four signal lines (signal lines HREQ, HANS, HCLK, and HDAT) used for hotline communication is called a second transmission line. A communication system for performing these hotline communications is called a "hotline communication system".

FIG. 5 is a timing chart showing an example of hotline communication. The body control unit 103 of this embodiment is configured to start hotline communication every second predetermined period (eg, 1 millisecond in this embodiment). This cycle is shorter than the cycle of command data communication. FIG. 5(a) is a diagram showing how hotline communication is repeatedly performed at predetermined intervals Tn. FIG. 5(b) shows a state in which the period Tx of one communication among the repeatedly executed hotline communications is enlarged. The hotline communication procedure will be described below with reference to the timing chart of FIG. 5(b).

Body control unit 103 and second body-side communication unit 118 first output an L-level signal from contact BP7 at the start of hotline communication (T6). That is, the signal level of the signal line HREQ is set to L level. The second lens side 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 execution of generation processing 501 for generating lens position data. The generation processing 501 is processing 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 execution of the generation processing 501, the lens control unit 203 and the second lens side communication unit 218 output an L level signal from the contact point LP8 (T7). That is, the signal level of the signal line HANS is set to L level. Body control unit 103 and second body-side communication unit 118 output clock signal 502 from contact BP9 in response to input of this signal to contact BP8. That is, the clock signal is transmitted to the second lens side communication section 218 via the signal line HCLK.

In synchronization with this clock signal 502, 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 point LP10. That is, the lens position data signal 503 is transmitted to the second body-side communication unit 118 via the signal line HDAT.

When transmission of the lens position data signal 503 is completed, the lens control section 203 and the second lens side communication section 218 output an H level signal from the contact point LP8. That is, the signal level of the signal line HANS is set to H level (T8). The second body-side 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 hotline communication. As described above, one lens position data signal 503 is transmitted by the lens control unit 203 and the second lens side communication unit 218 in one hotline communication. 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, contacts LP7 and BP7 are contacts through which an asynchronous signal (signal level of signal line HREQ/H (High) level or L (Low) level) is transmitted, and contacts LP8 and BP8 are contacts through which an asynchronous signal (signal line HANS signal level/H (High) level or L (Low) level) is transmitted.

It should be noted that command data communication and hotline communication can be performed simultaneously or partially in parallel. That is, one of the first lens side communication section 217 and the second lens side communication section 218 can communicate with the camera body 100 even when the other side is communicating with the camera body 100 . be.

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

In this initialization process, the lens control unit 203 (initialization control unit 223) first initializes the first lens side communication unit 217 and the second lens side communication unit 218. FIG. Similarly, body control section 103 first initializes first body side communication section 117 and second body side communication section 118 . These processes enable data communication (command data communication and hotline communication) between the camera body 100 and the interchangeable lens 200 .

After initializing each communication unit, the lens control unit 203 (initialization control unit 223 ) starts initializing a plurality of driven members of the interchangeable lens 200 . The interchangeable lens 200 of this embodiment includes a plurality of driven members (focusing lens 210b, blur correction lens 210c, and diaphragm 211). After the camera 1 is powered on, the body control unit 103 and the lens control unit 203 perform normal control processing on these driven members until the initialization control unit 223 completes execution of predetermined initialization processing. Can not do it. Examples of normal control processing include a drive condition transmission process by the drive condition transmission unit 222 and a drive process by the drive control unit 123 .

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

In this embodiment, the initialization status transmission section 221 transmits initialization status data indicating the initialization status of each driven member to the camera body 100 (initialization status reception section 121) at predetermined intervals. The body control unit 103 reads the initialization status data received by the initialization status reception unit 121, and starts sequential control processing for the driven members that have been initialized. For example, the drive control unit 123 does not perform the control process on the driven member for which the initialization status data indicate that the initialization process has not been completed.

FIG. 6 is a diagram showing the structure of information (data) representing the initialization status. When the initialization of each communication unit is completed, the body control unit 103 transmits the initialization status request command (data) 50 shown in FIG. Send. Upon receiving the initialization status request command (data) 50, the first lens side communication section 217 transmits initialization status information (data) 60 shown in FIG. 6B to the first body side communication section 117. FIG. That is, the initialization status transmission unit 221 transmits the initialization status information (data) 60 indicating whether the execution of the initialization process for each of the plurality of driven members has been completed or not through the lens side first communication unit 217. It is transmitted to the first body-side communication unit 117 at predetermined intervals (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, respectively.

In FIG. 6, the area described as "N/A" is an area where data is not specified. In other words, it does not matter what data is contained in the portion described as "N/A". The first body-side communication section 117 and the first lens-side communication section 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 a hexadecimal number "60H". good too.

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. be. The eighth bit is a flag 62 that indicates whether the execution of initialization processing for the diaphragm 211 has been completed or not. When the initialization process of the diaphragm 211 is incomplete, the initialization status transmission unit 221 transmits the initialization status information (data) 60 with the flag 62 being 0. Similarly, the 9th bit is a flag 63 indicating whether the execution of the initialization processing of the blur correction lens 210c has been completed or not, and the 10th bit is the completion of the initialization processing of the focusing lens 210b. A flag 64 indicates whether the

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

When the initialization processing 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 the control processing 78 of the focusing lens 210b, which will be described later, is completed (that is, during 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 aperture 211 . The initialization processing 73 of the aperture 211 includes, for example, home search processing of an aperture actuator (not shown) that drives the aperture 211 . This process is a process of driving the aperture actuator to drive the aperture 211 to the aperture open position (a position where the aperture abuts against a mechanical limit provided on the aperture open side where the aperture is fully opened) (contact drive). The lens control unit 203 (initialization status transmission unit 221) transmits the initialization status request command (data) 50 from the camera body 100 until the initialization processing 73 of the aperture 211 by the initialization control unit 223 is completed. Each time the camera body 100 receives the initialization status information (data) 60 in which the flags 62, 63, and 64 are all 0, the lens-side first communication unit 217 is caused to transmit (to the camera body 100).

Note that in the present embodiment, there are two types of processing for initializing the aperture 211 . One of them is the initialization process 1 when the power is turned on (activated) from the "power off state" in which the power switch on the camera body 100 side is turned off. The other is initialization processing 2 when the camera body is activated from a "sleep state" in which the power switch on the camera body side remains ON but the camera body is shifted to a low power consumption state. Here, the position of the diaphragm 211 before entering the sleep state (control diaphragm position) is stored in the memory within the lens control unit 203 after shifting to the sleep state.

Initialization processing 1 is processing for returning the aperture actuator (not shown) that drives the aperture 211 as described above.

On the other hand, in the initialization process 2, first, after performing the above-described origin setting process of the aperture actuator, the aperture position (control aperture position) stored in the memory in the lens control unit 203 before transition to the sleep state is stored. ), the aperture 211 is driven and controlled.

The body control unit 103 recognizes whether the camera body is in the power OFF state or the sleep state, and determines whether the initialization process 1 is to be performed when sending the 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 initialization processing 1 and initialization processing 2 based on this parameter.

When the execution of the initialization process 73 of the aperture 211 is completed (that is, when the initialization of the aperture 211 is completed and normal aperture control becomes possible), the initialization status transmission unit 221 transmits the initialization status information with the flag 61 set to 1. (Data) 60 will be sent. When the body control unit 103 receives the initialization status information (data) 60 in which the flag 61 is 1, it causes the drive control unit 123 to start executing the control processing 74 for the diaphragm 211 . The control processing for the aperture 211 includes, for example, photometric calculation processing for obtaining photometric information necessary for exposure control based on the output from the imaging device 104 in the body, and an aperture for detecting the current position of the aperture 211 . Acquisition processing of position information is included. The control processing of the aperture 211 also includes shooting aperture control processing for changing and controlling the aperture 211 to the shooting aperture value to be controlled at the time of shooting according to the shooting conditions such as the shooting mode and the aforementioned photometric information (object brightness). can be

On the other hand, the lens control unit 203 (initialization control unit 223) sequentially performs initialization processing 75 for the blur correction lens 210c and initialization processing 77 for the focusing lens 210b following the initialization processing for the diaphragm 211. FIG. That is, the lens control unit 203 (initialization control unit 223) in this embodiment completes the initialization processing of the diaphragm 211 before the initialization processing of other driven members. 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 each time each of these initialization processes is completed. After detecting such a change in each flag (that is, the end of each initialization process), the body control part 103 determines to the drive control part 123 that control other than the initialization process can be performed according to each flag. Control processing for the driven member (for example, control processing 76 of the blur correction lens 210c (for example, centering processing operation of the blur correction lens and accompanying positional information of the blur correction lens is transmitted by command data communication instead of the hot line communication system described above). system) and control processing 78 of the focusing lens 210b (for example, data related to focusing processing stored in the in-body memory (for example, defocus information indicating defocusing stored for the previous focusing processing). ) from the memory), etc. Then, when the initialization processing for each driven member shown in FIG. If an operation member instructing the start of shooting is operated (for example, a half-press operation/full-press operation on the release button), shooting preparation operations (focusing lens control, blur correction lens control, aperture control, etc.) are performed and shooting is performed. becomes possible.

The initialization processing 77 of the focusing lens 210b described above, like the initialization processing 73 of the diaphragm 211 described above, includes the origin setting processing of a focusing lens actuator (not shown) that drives the focusing lens. This origin search process is a process of driving the focusing lens to a predetermined reference position of the focusing lens (for example, tele end position or wide end position). Whether or not the focusing lens 210b reaches the reference position is detected by a sensor (photo interrupter, not shown) provided in the interchangeable lens, and the lens control unit 203 controls the focusing lens actuator based on the detection result of this sensor. stop control.

Note that the initialization processing 77 of the focusing lens 210b, like the initialization processing 73 of the aperture 211 described above, includes two types of processing (initialization processing 1 when the power is turned on (activated) from the "power OFF state" and , there is an initialization process 2) when starting the camera body from the "sleep state". The contents of the initialization processes 1 and 2 are the same as the initialization process 73 of the diaphragm 211. The only difference is whether the diaphragm 211 or the focusing lens 210b is driven. is omitted.

On the other hand, the initialization process 75 of the blur correction lens 210c described above is a process of calculating a correction value for correcting the output of the position detection sensor for detecting the position of the blur correction lens 210c. In this embodiment, a low-cost sensor (for example, Hall sensor) is used as the position detection sensor for the blur correction lens 210c. The output of such a position detection sensor fluctuates due to fluctuations in the ambient temperature. Therefore, it is necessary to correct the output of the position detection sensor according to the ambient temperature so that the position can be detected properly 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 . Initialization processing 75 is performed up to this correction value storage processing. When actually detecting the position of the blur correction lens 210c, based on the correction value stored in the memory of the lens control unit 203, the output of the position detection sensor that detects the position of the blur correction lens 210c is corrected. The ambient temperature is detected by a temperature sensor (not shown) provided on the circuit board inside the lens.

Note that in the initialization processing 75 in this embodiment, the origin setting processing of the blur correction lens 210c (the processing of driving the blur correction lens 210c to a predetermined reference position, The process of driving so as to match the center) is not performed for energy saving.

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

The driven state information (data) 80 is 4-byte data consisting of position data 81 of the focusing lens 210b, aperture diameter data 82 of the diaphragm 211, and position data 83 of the blur correction lens 210c. The position data 81 of the focusing lens 210b is a 1-byte integer, and a value from 0 to 255 corresponds to each position from the closest position to the infinite position. Similarly, the aperture diameter data 82 of the aperture 211 is a 1-byte integer, and values from 0 to 255 correspond to positions from the widest aperture (maximum aperture diameter) to the minimum aperture (minimum aperture diameter). The position data 83 of the blur correction lens 210c is data in which two 1-byte integers are combined. They correspond to values up to 255 and values from 0 to 255 in the Y-axis direction, respectively.

The body control unit 103 acquires the current driven state of each driven member by referring to the driven state data 80 received by the driven state receiving unit 122 . Then, based on the driven state obtained here, the drive control unit 123 is caused to perform 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 the target position.

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

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

In step S140, the body control unit 103 determines whether or not a predetermined period of time (for example, 16 milliseconds) has elapsed since step S130 was executed. The body control unit 103 repeats the process of step S140 until a predetermined period of time has passed. If the predetermined period has passed, the process proceeds to step S150. In step S<b>150 , the body control unit 103 transmits an initialization status request command (data) 50 to the interchangeable lens 200 . In step S<b>160 , the initialization status receiver 121 receives the 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 of time 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 section 123 executes a predetermined control process for the driven member whose initialization status has changed. In step S190, the body control unit 103 determines whether initialization of all driven members has been completed. If uninitialized driven members remain, the process returns to step S140 and waits for a predetermined period of time to elapse from the execution of step S190. On the other hand, if the initialization of all the driven members has been completed, the process proceeds to step S200, in which the camera body 100 is brought into a photographable state.

Next, processing executed by the lens control unit 203 will be described. In step S<b>210 , a lens start signal is input from the camera body 100 . The lens control unit 203 starts activation processing in response to this signal. In step S<b>220 , the initialization control unit 223 executes initialization processing of the first lens side communication unit 217 and the second lens side 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 section 223 sequentially starts the initialization processing of each driven member. The initialization control unit 223 first starts the initialization processing of the diaphragm 211, and when that is completed, sequentially starts the initialization processing of the other driven members. As described above, the initialization control unit 223 executes only one initialization process at a time.

In step S<b>250 , the lens control unit 203 determines whether or not the initialization status request command (data) 50 has been received from the camera body 100 . The lens control unit 203 repeats step S250 until the initialization status request command (data) 50 is received. Upon receiving the initialization status request command (data) 50, the process proceeds to step S260. In step S<b>260 , the initialization status transmission section 221 transmits the initialization status information (data) 60 to the camera body 100 . In step S270, the lens control unit 203 determines whether or not all the flags of the initialization status information (data) 60 transmitted immediately before in step S260 are 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 with all flags set to 1 has been transmitted, the process proceeds to step S280. In step S280, the lens control unit 203 shifts the interchangeable lens 200 to a photographable state.

According to the camera system according to the first embodiment described above, the following effects are obtained. (1) The initialization control section 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 the execution of the initialization process for each of the plurality of driven members has been completed or not to the camera body 100 . Since the interchangeable lens 200 transmits the initialization status to the camera body 100 in this way, it is possible to shorten the time required to detect the completion of initialization of the interchangeable lens.

Further, according to this embodiment, the initialization status information (data) is sent via the first transmission line (command data communication system) at a predetermined cycle (a request issued from the camera body at a first predetermined cycle). It is sent to the camera body 100 in response to a command, for example, every 16 msec. In this manner, the interchangeable lens 200 periodically transmits the initialization status to the camera body 100 at a predetermined cycle, so that the time required to detect completion of initialization of the interchangeable lens can be shortened.

Further, after the initialization of each driven member is completed, the driven state transmission unit 222 transmits the driven state data representing the driven state of the driven member via the second transmission path (hotline communication system) to a predetermined number. It is transmitted to the camera body 100 every cycle. Since this is done, the camera body 100 can quickly know the state of the driven member immediately after the completion of the initialization process.

(2) The initialization control unit 223 completes the initialization processing of the diaphragm 211 prior to the initialization processing of other driven members. Initialization processing of the diaphragm member in the present embodiment is processing of setting the diaphragm 211 to either the maximum aperture (initialization processing 1) or the shooting aperture aperture stored before sleep (initialization processing 2). The aperture 211 is initially set to a photometry preparation state (open photometry or stop-down photometry to the shooting aperture) depending on the situation. Since this is done, the camera body side can start preparation for photometry operation (photometry calculation processing based on the above-mentioned image sensor output, etc.) without waiting for the initialization of other driven members, and the photographing ready state can be obtained. can shorten the time to

(3) The initialization status transmission unit 221 of the interchangeable lens 200 transmits initialization status data 60 each time indicating the initialization status of a plurality of driven members to the camera body 100 at predetermined intervals. As a result, the camera body 100 can reliably grasp the situation of each driven member each time, and can perform preparatory operations on the body side according to the situation. time 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. By doing so, it is possible to always keep the execution completion order of the initialization processing of each driven member constant, which facilitates the control.

(5) After the initialization status reception section 121 receives the initialization status data 60 indicating that the initialization of the driven member has been completed, the driven status reception section 122 determines whether the driven status of the driven member has been completed. Start receiving. In this way, an incorrect driven state is not received from an uninitialized driven member.

(6) The drive control unit 123 does not perform the predetermined control process on the driven member for which the initialization status data 60 indicates that the initialization process has not been completed. Since this is done, it is possible to prevent inappropriate drive control from being performed on an uninitialized driven member.

(Second embodiment)
A 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, compared to the first embodiment, the order (procedure) in which the initialization control unit 223 executes initialization processing for the plurality of driven members is different. In addition, in the second embodiment, the same reference numerals are assigned to the same contents as in the first embodiment.

FIG. 10 is a time chart showing the execution order of initialization processing after power-on. The initialization control unit 223 according to the present embodiment executes initialization processing 72 for each communication unit, and then executes initialization processing for a plurality of driven members in parallel. That is, the initialization process 73 of the diaphragm 211, the initialization process 75 of the blur correction lens 210c, and the initialization process 77 of the focusing lens 210b are started simultaneously. Each of these initialization processes takes a different amount of time to execute, and the body control unit 103 starts executing the control process for the driven members in order from the driven member for which the initialization has been completed. For example, as shown in FIG. 10, when aperture initialization processing 73 is completed first, execution of aperture control processing 74 is started accordingly. When the execution of the aperture control process 74 is completed, it waits until the initialization process of other driven members is completed. Each time the execution of the initialization process is completed, the corresponding control process (for example, the blur correction lens control process 76 and the focusing lens control process 78) is executed.

The fact that the initialization processes 73 and 77 include two types of processes (processing at the time of startup from the "power off state" and processing at the time of startup from the "sleep state") is the first reason. It is similar to the embodiment.

Further, the operational flow of the second embodiment is substantially the same as the operational 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 "simultaneously starts" the initialization process of each driven member in step S240.

According to the camera system according to the second embodiment described above, the following effects are obtained in addition to the effects obtained by the camera system according to the first embodiment.
(1) The initialization control unit 223 starts executing initialization processing for a plurality of driven members at the same time. As a result, a plurality of initialization processes can be processed in parallel, so that the time required for completing all the initializations can be shortened, and accordingly the time until the imaging possible state can be shortened.

(2) The initialization control unit 223 starts executing initialization processing for a plurality of driven members at the same time. Then, the interchangeable lens 200 transmits information indicating the completion of the initialization process to the camera body side every time the initialization process is completed for each driven member. As a result, the camera body can quickly recognize the driven member for which the initialization processing has been completed, and accordingly, the camera body side can sequentially start the photographing preparation operation, further shortening the time until it becomes ready for photographing. It becomes possible to

The following modifications are also within the scope of the present invention, and it is also possible to combine one or more of the modifications with the above-described embodiments.

(Modification 1)
In each of the above-described embodiments, the driven state transmission unit 222 did not transmit the driven state until initialization of all driven members was completed. Alternatively, the driven state may be sequentially transmitted from the driven member whose initialization has been completed. For example, the driven state data 80 is variable-length data, only information about the aperture diameter of the diaphragm 211 can be transmitted, and after the initialization of the diaphragm 211 is completed, transmission of the driven state of the diaphragm 211 is started. You may do so.

(Modification 2)
The driven member is not limited to the diaphragm, focusing lens, and blur correction lens described above. Also, the order of initialization of the driven members is not limited to the order shown in each of 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 members is transmitted to the camera body side using the hotline communication system as the driven state information of the driven members. It is configured to 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 of the driven members.

(Modification 4)
In each of the above embodiments, the interchangeable lens 200 is configured to transmit the initialization status data 60 to the camera body 100 at the first predetermined cycle using the command data communication system. However, until the initialization processing on the interchangeable lens 200 side is completed, it may be devised to quickly inform the camera body side of the state change of the initialization processing. For example, the communication cycle of the command data communication system may be shortened 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 a cycle earlier than the first predetermined cycle described above. As a result, the camera body 100 can quickly recognize the completion of the initialization processing of each driven member, and can shorten the time required for preparation for photographing and photographing.

(Modification 5)
In the initialization processing 75 of the blur correction lens 210c in each of the above embodiments, the blur correction lens 210c is driven to a reference position (for example, the center position of the blur correction lens 210c is aligned with the optical axis center of the photographing lens 200). , the process of driving the blur correction lens 210c). For example, when the remaining battery capacity of the camera body is sufficient, the initialization process 75 may be added to the process of finding the origin of the blur correction lens 210c.

(Modification 6)
In the second embodiment, the three initialization processes 73, 75, and 77 are started at the same time. may be configured to start at different timings.

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

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

REFERENCE SIGNS LIST 1 camera 100 camera body 101 lens mount 102 holding unit 103 body control unit 117 first body side communication unit 118 second body side communication unit 121 initialization status receiving unit , 122 Driven 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 Blur correction lens 211 Aperture 212 Focusing lens drive unit 213 Blur correction lens drive unit 214 Aperture drive unit 217 Lens side first communication unit 218 Lens side second communication unit 221 Initial stage 222 driven state transmission unit 223 initialization control unit

Claims (12)

An accessory capable of communicating with a camera body,
a first driven member whose state changes upon receiving the driving force;
a second driven member whose state changes upon receiving the driving force;
an initialization unit that performs initialization processing on the first driven member and the second driven member;
When the initialization process for the first driven member is completed, regardless of whether the initialization process for the second driven member is completed, the control process for the first driven member is started. a control unit that initiates execution;
accessories with The accessory of claim 1, wherein
The accessory according to claim 1, wherein the initialization processing for the first driven member includes processing for calculating a correction value of an output signal of a sensor that detects the position of the first driven member. 3. The accessory according to claim 1 or 2,
The accessory, wherein the initialization process for the first driven member is a process that does not involve movement of the first driven member. An accessory according to any one of claims 1 to 3,
The accessory, wherein the initialization process for the second driven member is a process for moving the second driven member to a predetermined position. An accessory according to any one of claims 1 to 4,
a first transmission unit that transmits a response signal indicating whether or not the initialization process is completed to the camera body;
The first transmission unit provides information indicating whether or not the initialization processing of the first driven member has been completed, and indicates whether or not the initialization processing of the second driven member has been completed. An accessory that sends a response signal containing information and information. An accessory according to any one of claims 1 to 5,
a receiving unit that receives an instruction signal for instructing driving of the driven member from the camera body;
The receiving section does not receive the instruction signal for the first driven member from the camera body before the initialization processing of the first driven member is completed, and An accessory that receives the instruction signal for the first driven member from the camera body upon completion of the initialization process. An accessory according to any one of claims 1 to 6,
An accessory, comprising: a second transmitter that transmits a driven state of at least one of the first driven member and the second driven member to the camera body. In the accessory according to claim 7 quoting claim 5,
The first transmission unit transmits information indicating that the initialization process for the first driven member has been completed and information indicating that the initialization process for the second driven member has been completed. and transmitting a response signal containing the second transmitter, the accessory can initiate communication with the second transmitter. In the accessory according to claim 7 or 8 quoting claim 5,
a third driven member that is different from the first driven member and the second driven member and receives a driving force to change its state;
The driven state of the first driven member is transmitted to the camera body by the first transmitter and the second transmitter, and the driven state of the third driven member is transmitted by the first transmitter. An accessory that is transmitted to the camera body and not transmitted by the second transmission unit. An accessory according to any one of claims 1 to 9,
an optical system that has a focus lens and a blur correction lens and forms a subject image;
A diaphragm that adjusts the amount of light transmitted through the optical system,
The first driven member is the blur correction lens,
The accessory, wherein the second driven member is the focus lens. The accessory according to any one of claims 7, 8, 9 and 10 depending on claim 5, wherein
The first transmission unit transmits a response signal indicating whether or not the initialization process is completed in synchronization with a first clock signal,
The accessory, wherein the second transmitter transmits the driven state in synchronization with a second clock signal different from the first clock signal. The accessory according to any one of claims 1 to 11 is an interchangeable lens.

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