JP2020184087A - Accessory and exchange lens - Google Patents

Abstract

To solve a problem of insufficient information relating initialization for an existing camera system.SOLUTION: An exchange lens attached to a camera body includes: a driving target member whose position is varied by reception of driving force; an initialization part for controlling initialization processing to the driving target member; a first contact point for transmitting positional information relating to a position of the driving target member having been driven by the driving force to the camera body; and a second contact point, which is different from the first contact point, for transmitting the initialization information indicating a situation of the initialization processing of the driving target member to the camera body.SELECTED DRAWING: Figure 1

Description

The present invention relates to an interchangeable lens.

A camera system consisting of 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 including a camera body and a camera head, which initializes the camera head.

Japanese Unexamined Patent Publication No. 2006-319631

In an interchangeable lens mounted on a camera, a mechanism different from the conventional technology is desired with respect to a mechanism related to initialization of the interchangeable lens.

The interchangeable lens according to one aspect of the present invention includes a mounting portion to which the camera body is detachably attached, a plurality of driven members whose state changes in response to a driving force, and at least one of the plurality of driven members. The initialization unit that executes the initialization process and the initialization status information indicating that the initialization process has been completed are sent via the first transmission line in response to the initialization status request from the camera body. A second communication unit that transmits the first communication unit to the camera body and at least one driven state of the plurality of driven members are transmitted in a first predetermined cycle, which is different from the first transmission line. A second communication unit that transmits information to the camera body via a road is provided.

It is a perspective view which showed the camera system of the interchangeable lens type to which this invention was applied. It is sectional drawing which showed the interchangeable lens type camera system to which this invention was applied. It is a schematic diagram which shows the detail of the holding part 102, 202. It is a timing chart which shows an example of a command data communication. It is a timing chart which shows an example of hotline communication. It is a figure which shows the structure of the initialization status data. It is a time chart which shows the execution order of the initialization process after power-on. It is a figure which shows the structure of the driven state data. It is a flowchart which shows the process from the power-on operation to the possibility of shooting. It is a time chart which shows the execution order of the initialization process after power-on.

(First Embodiment)
FIG. 1 is a perspective view showing an interchangeable lens camera system to which the present invention is applied. Note that FIG. 1 shows only the devices and devices according to the present invention, and the illustration and description of other devices and devices will be 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 can be attached and detached. At a position near the lens mount 101 of the camera body 100 (on the inner peripheral side of the lens mount 101), a holding portion (electrical connection) that holds a contact while 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.

Further, the interchangeable lens 200 is provided with a lens mount 201 to which the camera body 100 can be detachably attached, which corresponds to the lens mount 101 on the body side. At a position near the lens mount 201 of the interchangeable lens 200 (on the inner peripheral side of the lens mount 201), a holding portion (electrical connection) that holds a 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 portion 102 provided with the plurality of contacts is electrically and physically connected to the holding portion 202 provided with the plurality of contacts. Both holding units 102 and 202 are used for supplying power from the camera body 100 to the interchangeable lens 200 and for transmitting and receiving signals between the camera body 100 and the interchangeable lens 200.

An image sensor 104 such as CMOS or CCD is provided behind the lens mount 101 in the camera body 100. A button 107, which is an input device, is provided above the camera body 100. The user gives a shooting instruction, a shooting condition setting instruction, and the like to the camera body 100 by using an input device such as a button 107.

FIG. 2 is a cross-sectional view showing an interchangeable lens 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 is composed of a plurality of lenses 210a to 210c and an aperture 211. The plurality of 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 the 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 is composed of a microcomputer (not shown) and peripheral circuits thereof. The first communication unit 217 on the lens side, the second communication unit 218 on the lens side, the focusing lens drive unit 212, the blur correction lens drive unit 213, the aperture drive unit 214, the ROM 215, and the RAM 216 are connected to the lens control unit 203. ..

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 uses these communication interfaces to perform each communication (hotline communication, command data communication) described later with the camera body 100 (body control unit 103 described later).

The focusing lens driving unit 212 has an actuator such as a stepping motor, and drives the focusing lens 210b in response to a signal input to the focusing lens driving unit 212. Similarly, the blur correction lens drive unit 213 and the aperture drive unit 214 also have actuators such as a voice coil motor, and drive the blur correction lens 210c and the aperture 211, respectively, in response to an input signal.

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

A driven member other than the above-mentioned driven members (focusing lens 210b, blur correction lens 210c, aperture 211) may be provided in the interchangeable lens 200. For example, similarly to 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 for electrically driving the zoom lens (so-called power zoom mechanism) is an interchangeable lens. It may be provided in 200.

The ROM 215 is a non-volatile storage medium, and a predetermined control program or the like executed by the lens control unit 203 is stored 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 when the lens control unit 203 executes 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 provides initialization status data (for example, status data indicating whether the execution of the initialization process is completed or incomplete) indicating the status of the initialization process 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 captures the driven state data representing the driven states of the plurality of driven members described above at predetermined cycles via a second transmission line (detailed later) different from the first transmission line. Send to the body. Here, a mechanism will be described in which the initialization status transmission unit 221 transmits the initialization status data to the camera body 100 at predetermined intervals. The camera body 100 issues a command to the interchangeable lens 200 at predetermined intervals until it receives a signal from the interchangeable lens 200 indicating the completion of the initialization process, and requests initialization status data. The initialization status transmission unit 221 of the interchangeable lens responds with the initialization status data prepared 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 a predetermined cycle.

A shutter 115 for controlling the exposure state of the image sensor 104 and an optical filter 116 in which an optical low-pass filter and an infrared cut filter are combined are provided on the front surface of the image sensor 104. The subject light transmitted through the imaging optical system 210 is incident on 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 is composed of a microcomputer (not shown), a RAM, a peripheral circuit thereof, and the like.

The body side first communication unit 117 and the 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 data can be exchanged with the lens-side first communication unit 217 via a plurality of contacts provided in 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, the body-side first communication unit 117 and the body-side second communication unit 118 are body-side communication interfaces, respectively. The body control unit 103 uses these communication interfaces to perform each communication (hotline communication, command data communication) described later with the interchangeable lens 200 (lens control unit 203).

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

The body control unit 103 includes an initialization status reception unit 121, a driven state reception unit 122, and a drive control unit 123, depending on the software form. Each of these functional units is realized by software when the body control unit 103 executes 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 the 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.

(Explanation of holding units 102 and 202)
FIG. 3 is a schematic view showing details of the holding portions 102 and 202. Note that the holding portion 102 is arranged on the right side of the lens mount 101 in FIG. 3 according to the actual mount structure. That is, the holding portion 102 of the present embodiment is arranged at a position deeper than the mount surface of the lens mount 101 of the camera body 100 (a place 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. Represents. 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 connect 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 in both holding portions are also connected to each other. Since such a mount structure is well known, further description and illustration will be omitted.

As shown in FIG. 3, the holding portion 102 has 12 contacts of BP1 to BP12. Further, the holding unit 202 has 12 contacts of LP1 to LP12 corresponding to the above 12 contacts, respectively.

The contact BP1 and the contact BP2 are connected to the first power supply circuit 130 in the camera body 100. The first power supply circuit 130 is an interchangeable lens excluding circuits (focusing lens drive unit 212, blur correction lens drive unit 213, aperture drive unit 214, etc.) having a drive system such as an actuator at contact BP1 and having relatively large power consumption. The operating voltage of each part in 200 is supplied. That is, the contact BP1 and the contact LP1 supply the operating voltage of each part in the interchangeable lens 200 excluding the above-mentioned drive parts. 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, the voltage width in the 3V range), but the standard supplied voltage value is the maximum voltage value and the minimum voltage value. It is a voltage value near the intermediate value of. As a result, the current value supplied from the camera body 100 side to the interchangeable lens 200 side is a current value in the 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 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 composed of the contact BP1 and the contact LP1 is referred to as a signal line V33. Further, the signal line composed of the contact BP2 and the contact LP2 is referred to as a signal line GND. These contacts LP1, LP2, BP1 and BP2 form power supply 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 body-side first communication unit 117. The contacts LP3, LP4, LP5, and LP6 on the interchangeable lens 200 side corresponding to these contacts are connected to the first communication unit 217 on the lens side. The body-side first communication unit 117 and the lens-side first communication unit 217 use these contacts (communication system contacts) to transmit and receive data to and from each other. The content 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, the signal line composed of the contact BP3 and the contact LP3 is referred to as a signal line CLK. Similarly, the signal line composed of the contact BP4 and the contact LP4 is the signal line BDAT, the signal line composed of the contact BP5 and the contact LP5 is the signal line LDAT, and the signal line composed of the contact BP6 and the contact LP6 is a signal. Called line RDY.

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

In the following description, the signal line composed of the contact BP7 and the contact LP7 is referred to as a signal line HEQU. Similarly, the signal line composed of the contact BP8 and the contact LP8 is the signal line HANS, the signal line composed of the contact BP9 and the contact LP9 is the signal line HCLK, and the signal line composed of the contact BP10 and the contact LP10 is a signal. 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 applies the drive voltage of a circuit (focusing lens drive unit 212, blur correction lens drive unit 213, aperture drive unit 214, etc.) having a drive system such as an actuator to the contact BP12 and having relatively large power consumption. Supply. That is, the drive voltages of the focusing lens drive unit 212, the blur correction lens drive unit 213, and the aperture drive unit 214 are supplied from the contact BP12 and the contact LP12. The voltage value that can be supplied to the contact BP12 has a range of a minimum voltage value to a maximum voltage value, and all of the ranges are voltage values larger than the voltage value range that can be supplied to the contact BP1 described above (for example). , 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 whose magnitude is different from the voltage value supplied to the above-mentioned contact BP1. The voltage value that is normally supplied to the contact BP 12 is a voltage value near the intermediate value between the maximum voltage value and the minimum voltage value that can be supplied to the contact BP 12. As a result, the current supplied from the camera body 100 side to the interchangeable lens 200 side becomes a current value of about 10 mA to several A in the power-on state.

The contact BP 11 is a ground terminal corresponding to the drive voltage applied to the contact BP 12. That is, the contact BP11 and the contact LP11 are ground terminals corresponding to the drive voltage.

In the following description, the signal line composed of the contact BP11 and the contact LP11 is referred to as a signal line PGND. Further, the signal line composed of the contact BP12 and the contact LP12 is referred to as a signal line BAT. These contacts LP11, LP12, BP11, and BP12 form power supply 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 values (current values) supplied to the contacts BP12 and LP12 and the voltage values (current values) supplied to the contacts BP1 and LP1, they are supplied to each of the contacts. The difference between the maximum value and the minimum value of the current flowing through the contact BP11 and the contact LP11, which are the ground terminals for each voltage, is larger than the difference between the maximum value and the minimum value of the current flowing through the contact BP2 and the contact 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 due to the fact that each drive unit does not consume power.

(Explanation of command data communication)
The lens control unit 203 controls the lens-side first communication unit 217 to 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. The reception and the transmission of the response data to the first communication unit 117 on the body side are performed in parallel in a predetermined first predetermined cycle (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, the 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". Further, 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. The communication system for performing these command data communications 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 confirm 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 or not communication is possible with the first communication unit 217 on the lens side. The lens control unit 203 and the lens-side first communication unit 217 output an H (High) level signal 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 reaches the L level. Also, the next process during communication is not executed.

If the signal line RDY is at the L (Low) level, the body control unit 103 and the body-side first communication unit 117 output the clock signal 401 from the contact BP3. That is, the clock signal 401 is transmitted to the first communication unit 217 on the lens side via the signal line CLK. The body control unit 103 and the body side first communication unit 117 synchronize with the clock signal 401 to output the 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 lens-side first 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 from the contact LP5 to the lens side command packet which is the first half of the response data. The signal 403 is output. That is, the lens-side command packet signal 403 is transmitted to the body-side first 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 the 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 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. The first communication unit 217 on the lens side outputs an L level signal from the contact LP6 in response to this notification. That is, the signal level of the signal line RDY is set to the L level (T3). The body control unit 103 and the body-side first communication unit 117 output a clock signal 405 from the contact BP3 in response to this change in signal level. That is, the clock signal 405 is transmitted to the first communication unit 217 on the lens side via the signal line CLK.

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

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, is the data packet signal. Outputs 407. That is, the lens-side data packet signal 407 is transmitted to the body-side first 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 again in response to the completion of transmission of the lens-side data packet signal 407 (T4). The lens control unit 203 starts the 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 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 command packet signal 402 on the body side requests 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, the lens control unit 203 uses the checksum data included in the command packet signal 402 as the first control process 404 to easily determine whether or not there is an error in the communication of the command packet signal 402 from the number of data bytes. It also executes the communication error check process to check. The signal of the specific data generated by 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 to 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.

Further, for example, the case where the received command packet signal 402 on the body side is an instruction to drive the 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 the first control process 404, the lens control unit 203 analyzes the content of the command packet signal 402 and generates an understanding signal indicating that the content is understood. Further, the lens control unit 203 also executes the communication error check process as described above by using the checksum data included in the command packet signal 402 as the first control process 404. The consent signal generated by the first control process 404 is output to the body side as a lens side data packet signal 407. Further, the lens control unit 203 executes the analysis processing of the contents of the body side data packet signal 406 as the second control process 408, and the communication error as described above using the checksum data included in the body side data packet signal 406. 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. As a result, the lens control unit 203 causes the first communication unit 217 on the lens side to output an L level signal from the contact LP6. That is, the signal level of the signal line RDY is set to the L level (T5).

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

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

Similarly, in one command data communication, the lens control unit 203 and the lens side first communication unit 217 transmit one lens side command packet signal 403 and one lens side data packet signal 407, respectively. That is, 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 lens-side first communication unit 217 simultaneously receive the control data from the body-side first communication unit 117 and transmit the response data to the body-side first communication unit 117. And do it. The contact LP6 and contact BP6 used for command data communication are contacts through which asynchronous signals (signal line RDY signal level / H (High) level or L (Low) level) that are not synchronized with other clock signals are transmitted. is there.

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

In the present embodiment, the 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". Further, a transmission line composed of four signal lines (signal lines HRQ, HANS, HCLK, and HDAT) used for hotline communication is referred to as a second transmission line. Further, the communication system for performing these hotline communications is referred to as a "hotline 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 hotline communication every second predetermined cycle (for example, 1 millisecond in this embodiment). This cycle is shorter than the cycle for command data communication. FIG. 5A is a diagram showing how hotline communication is repeatedly executed every predetermined cycle Tn. Of the hotline communications executed repeatedly, FIG. 5B shows how the period Tx of a certain communication is expanded. Hereinafter, the procedure of hotline communication will be described based on the timing chart of FIG. 5B.

The body control unit 103 and the body-side second communication unit 118 first output an L-level signal from the contact BP7 at the start of hotline communication (T6). That is, the signal level of the signal line HRQ is set to the L level. The second communication unit 218 on the lens side 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 the generation process 501 that generates the 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 generate 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 L level. The body control unit 103 and the body-side second communication unit 118 output a clock signal 502 from the contact BP9 in response to the input of this signal to the contact BP8. That is, the clock signal is transmitted to the second communication unit 218 on the lens side via the signal line HCLK.

The lens control unit 203 and the lens-side second 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 second communication unit 118 on the body side via the signal line HDAT.

When the transmission of the lens position data signal 503 is completed, the lens control unit 203 and the lens side second 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 H level (T8). The second communication unit 118 on the body side 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 HRQ is set to the H level (T9).

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

The command data communication and the hotline communication can be executed at the same time 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.

(Explanation of processing executed after the power is turned 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 initialization processing of each part of the interchangeable lens 200. Similarly, the body control unit 103 also executes initialization processing for each part 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 also initializes the body-side first communication unit 117 and the body-side second communication unit 118. By these processes, data communication (command data communication and hotline 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 (focusing lens 210b, blur correction lens 210c, and aperture 211). After the power of the camera 1 is turned on, the body control unit 103 and the lens control unit 203 execute normal control processing on these driven members until the execution of the predetermined initialization processing by the initialization control unit 223 is completed. Can not do it. Examples of the normal control processing include a driven state transmission process by the driven state transmission unit 222, a drive process by the drive control unit 123, and the like.

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

In the present embodiment, the initialization status transmission unit 221 transmits the 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 control processing for the driven members for which initialization has been completed. For example, the drive control unit 123 does not execute the control process on the driven member whose execution of the initialization process is indicated by the initialization status data.

FIG. 6 is a diagram showing a structure of information (data) representing an initialization status. When the initialization of each communication unit is completed, the body control unit 103 sends the initialization status request command (data) 50 shown in FIG. 6A from the first communication unit 117 on the body side to the interchangeable lens 200 at predetermined intervals. Send. When the lens-side first communication unit 217 receives the initialization status request command (data) 50, it transmits the 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 the initialization status information (data) 60 indicating 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 first communication unit 117 on the body side 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.

The area described as "N / A" in FIG. 6 is an area for which no data is specified. That is, any data may be contained in the place 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 integer for identification indicating that this data is the initialization status request command (data) 50. 51. In FIG. 6A, as an example, the integer 51 for identification is a hexadecimal number of "60H", but if it can be identified that it is the initialization status request command (data) 50, another communication is used. May be good.

The initialization status information (data) 60 shown in FIG. 6B is 2-byte data, and the lower 1 byte is an integer 61 for identification indicating that this data is initialization status information (data) 60. is there. The eighth bit is a flag 62 indicating whether the execution of the initialization process of the aperture 211 is completed or incomplete. When the initialization process of the aperture 211 is incomplete, the initialization status transmission unit 221 transmits the initialization status information (data) 60 in which the flag 62 is 0. Similarly, the 9th bit is a flag 63 indicating whether the initialization process of the blur correction lens 210c is completed or incomplete, and the 10th bit is the completion or incomplete execution of the initialization process of the focusing lens 210b. It is a flag 64 indicating.

FIG. 7 is a time chart showing the execution order of the initialization process after the power is turned on. When the power-on operation is executed for the camera 1 at time T10, the body control unit 103 starts the 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. After that, the body control unit 103 repeatedly transmits the initialization status request command (data) 50 at predetermined cycles until the control process 78 of the focusing lens 210b, which will be described later, is completed (that is, in the period Ti).

When the initialization process 72 of each communication unit is completed, the lens control unit 203 (initialization control unit 223) starts the initialization process 73 of the aperture 211. The initialization process 73 of the aperture 211 includes, for example, an origin setting process of an aperture actuator (not shown) that drives the aperture 211. This process is a process of driving the aperture actuator to drive (apply drive) the aperture 211 to the aperture open position (the position that abuts on the mechanical limit provided on the aperture open side where the aperture 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 execution of the initialization process 73 of the aperture 211 by the initialization control unit 223 is completed. Every time the command is received, the initialization status information (data) 60 in which the flags 62, 63, and 64 are all 0 is transmitted to the first communication unit 217 on the lens side (to the camera body 100).

In this embodiment, there are two types of processing as the initialization processing of the aperture 211. One of them is the initialization process 1 when the power ON operation (start) is performed from the "power OFF state" in which the power switch on the camera body 100 side is turned OFF. The other is the initialization process 2 when 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 has shifted to the low power consumption state. Here, the position of the aperture 211 (control aperture 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 origin setting process of a diaphragm actuator (not shown) that drives the diaphragm 211 as described above.

On the other hand, in the initialization process 2, the aperture position (control aperture position) before the transition to the sleep state stored in the memory in the lens control unit 203 described above is performed after the origin setting process of the aperture actuator as described above is first performed. ), It is a process of driving and controlling the aperture 211.

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

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 is possible), the initialization status transmission unit 221 is set to the initialization status information with flag 61 set to 1. (Data) 60 will be transmitted. When the body control unit 103 receives the initialization status information (data) 60 in which the flag 61 is 1, the drive control unit 123 causes the drive control unit 123 to start executing the control process 74 of the aperture 211. The control process of the aperture 211 includes, for example, a photometric calculation process for obtaining photometric information necessary for performing exposure control based on the output from the image sensor 104 in the body, and an aperture for detecting the current position of the aperture 211. Includes location information acquisition processing. Further, the control process of the aperture 211 includes a shooting aperture control process for changing and controlling the aperture 211 to the shooting aperture value to be controlled at the time of shooting according to the shooting mode and the shooting conditions such as the above-mentioned photometric information (subject brightness). You may.

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 before the initialization process of the other driven member. Each time each of these initialization processes is 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 the body control unit 103 detects such a change in each flag (that is, the end of each initialization process), it is determined that the drive control unit 123 can control other than the initialization process according to each flag. Control processing for the driven member (for example, control processing 76 of the blur correction lens 210c (for example, the centering processing operation of the blur correction lens and the position information of the blur correction lens accompanying it are command data communication instead of the above-mentioned hotline communication system). Data related to the focusing process 78 (for example, the focusing process stored in the in-body memory (for example, the defocus information stored for the immediately preceding focusing process)) and the control process 78 of the focusing lens 210b (for example, the operation acquired via the system) ) Is executed from the memory, etc.), and when the initialization process of each driven member shown in FIG. 7 is completed and all the control processes of each driven member are completed, the camera 1 If the operation member instructing the start of shooting is operated (for example, half-press operation / full-press operation to the release button), shooting is performed through shooting preparation operations (focusing lens control, blur correction lens control, aperture control, etc.). Becomes possible.

The initialization process 77 of the focusing lens 210b described above includes an origin setting process of a focusing lens actuator (not shown) for driving the focusing lens, similarly to the initialization process 73 of the aperture 211 described above. This origin setting process is a process of driving the focusing lens to a predetermined reference position (for example, a tele end position or a wide end position) of the focusing lens. Whether or not the focusing lens 210b has reached the reference position is detected by a sensor (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. Is stopped and controlled.

The initialization process 77 of the focusing lens 210b also has two types of processes (initialization process 1 when the power is turned on (started) from the "power off state"), similarly to the initialization process 73 of the aperture 211 described above. , There is an initialization process 2) when the camera body is started 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 explanation of 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, a hall sensor) is used as the position detection sensor of 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 proper position can be detected 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 initialization process 75 is performed up to the storage process of the correction value. When the actual position of the blur correction lens 210c is detected, the output of the position detection sensor that detects the position of the blur 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 of the present embodiment, the origin setting process of the blur correction lens 210c (the process of driving the blur correction lens 210c to a predetermined reference position, for example, the center of the blur correction lens 210c is the optical axis of the interchangeable lens 200. The process of driving the lens to match the center) is not performed to save energy.

(Explanation of driven state data)
FIG. 8 is a diagram showing a structure of driven state information (data). The driven state information (data) is information (data) representing a 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) at predetermined cycles (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 lens side second communication unit 218 to the body side second communication unit 118 via the second transmission line. 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. That is, the transmission of the driven state information (data) 80 is not started until the initialization process of each driven member by the initialization control unit 223 is completed. In other words, the driven state receiving unit 122 on the camera body 100 side receives the initialization status information (data) 60 indicating that the initialization of all the driven members is completed by the initialization status receiving unit 121. Later, by issuing a request signal to the interchangeable lens 200 using the above-mentioned hotline communication system, reception of the driven state information (data) 80 is started. Here, a mechanism will be described in which the driven state transmission unit 222 transmits initialization status data to the camera body 100 at predetermined cycles (every second cycle). 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 the 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 in a second predetermined cycle.

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

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 made 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 a target position.

(Explanation of processing from power-on operation to shooting possible)
FIG. 9 is a flowchart showing a process from the power-on operation to the enablement of shooting. The left side of FIG. 9 shows the process executed by the body control unit 103, and the right side of FIG. 9 shows the process 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 S110, 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 S120, the body control unit 103 outputs a predetermined lens activation signal to the interchangeable lens 200 via the contact point 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 or not a predetermined period (for example, 16 milliseconds) has elapsed from 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 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 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 all the driven members have been initialized. If the uninitialized driven member remains, the process returns to step S140 and waits for a predetermined period to elapse from the execution of step S190. On the other hand, when the initialization of all the driven members has been completed, the process proceeds to step S200 to shift the camera body 100 to a state in which shooting is possible.

Next, the process executed by the lens control unit 203 will be described. In step S210, 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 the initialization processing of the lens-side first communication unit 217 and the lens-side second communication unit 218. In step S230, 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 it 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 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 it receives the initialization status request command (data) 50. Upon receiving the initialization status request command (data) 50, the process proceeds to step S260. In step S260, the initialization status transmission unit 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 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, when 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 state in which photography is possible.

According to the camera system according to the first embodiment described above, the following 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 execution of 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, a request for initializing status information (data) to be issued from the camera body side in a predetermined predetermined cycle (a first predetermined cycle from the camera body side) via the first transmission line (command data communication system). It is in the form of responding to a command, and is transmitted to the camera body 100 every 16 msec, for example. 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 initialization of the interchangeable lens can be shortened.

Further, the driven state transmitting unit 222 determines the driven state data representing the driven state of the driven member via the second transmission line (hotline communication system) after the initialization of each driven member is completed. 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 process of the aperture 211 before the initialization process of other driven members. The initialization process of the aperture member in the present 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 the metering ready state (open metering or aperture metering to the shooting aperture) according to the situation. Since this is done, the camera body side can start preparing for the photometric operation (photometric calculation processing based on the above-mentioned image sensor output, etc.) without waiting for the initialization of other driven members, and the camera body can take a picture. It is possible to shorten the time until it becomes.

(3) The initialization status transmission unit 221 of the interchangeable lens 200 transmits the initialization status data 60 indicating the initialization status of the plurality of driven members to the camera body 100 at predetermined intervals. Since this is done, the camera body 100 can surely grasp the situation of each driven member each time, and can perform the preparatory operation on the body side according to the situation, and as a result, until the camera body is ready for shooting. Time can be shortened.

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

(5) The driven state receiving unit 122 is in the driven state of the driven member after the initialization status data 60 indicating that the initialization of the driven member is completed is received by the initialization status receiving unit 121. Start receiving. Since this is done, an inaccurate driven state is not received from the uninitialized driven member.

(6) The drive control unit 123 does not execute a predetermined control process on the driven member whose execution of the initialization process is indicated by the initialization status data 60. Since this is done, improper drive control is not performed on 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, as compared with the first embodiment, the order (procedure) in which the initialization control unit 223 executes the initialization processing of the plurality of driven members is different. In the second embodiment, the same reference numerals are given when the same contents as those in the first embodiment are shown.

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 the present embodiment executes the initialization processing 72 of each communication unit, and then executes the initialization processing of the plurality of driven members in parallel. That is, the initialization process 73 of the aperture 211, the initialization process 75 of the blur correction lens 210c, and the initialization process 77 of the focusing lens 210b are simultaneously started to be executed. The time required to execute each of these initialization processes is different, and the body control unit 103 starts executing the control process of the driven member in order from the driven member for which the initialization is completed. For example, as shown in FIG. 10, when the aperture initialization process 73 is completed for the first time, 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 the other driven member is completed. Then, each time the execution of the initialization process is completed, the corresponding control process (for example, the blur correction lens control process 76 or the focusing lens control process 78) is executed.

It should be noted that, as the initialization processes 73 and 77, the existence of two types of processes (a process at startup from the "power OFF state" and a process at startup from the "sleep state") is the first of the above. It is the same as the embodiment.

The operation flow of the second embodiment is almost 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 the initialization process of each driven member at the same time” in step S240.

According to the camera system according to the second embodiment described above, the following effects can be obtained in addition to the effects obtained by the camera system according to the first embodiment.
(1) The initialization control unit 223 starts executing the initialization processing of 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 to complete all the initializations can be shortened, and accordingly, the time required to be ready for shooting can be shortened.

(2) The initialization control unit 223 starts executing the initialization processing of a plurality of driven members at the same time. Then, 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. By doing so, the camera body can quickly know the driven member for which the initialization process has been completed, and along with this, the camera body side can start the shooting preparation operation in sequence, further shortening the time until the camera body is ready for shooting. It becomes possible to do.

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

(Modification example 1)
In each of the above-described embodiments, the driven state transmitting unit 222 did not transmit the driven state until the initialization of all the driven members was completed. The driven state may be sequentially transmitted from the driven member whose initialization has been completed. For example, the driven state data 80 is set to variable length data, only information on the aperture diameter of the diaphragm 211 can be transmitted, and after the initialization of the diaphragm 211 is completed, the 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 aperture, the focusing lens, and the blur correction lens described above. Further, the initialization order 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 parts is transmitted as the driven state information of the driven member that communicates with 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 a driven state of any one of the driven members.

(Modification example 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 in the first predetermined cycle by using the command data communication system. However, until the initialization process on the interchangeable lens 200 side is completed, it may be devised so that the camera body side is notified of the state change of the initialization process as soon as possible. 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 be earlier than the first predetermined cycle described above. As a result, the camera body 100 can quickly know the completion of the initialization process of each driven member, and can shorten the period until the shooting preparation and the shooting are performed.

(Modification 5)
In the initialization process 75 of the blur correction lens 210c in each of the above embodiments, the process of driving the blur correction lens 210c to the reference position (for example, the center position of the blur correction lens 210c is aligned with the center of the optical axis of the photographing lens 200). , The process of driving the blur correction lens 210c) may be performed. For example, when the battery level on the camera body side is sufficient, the origin setting process of the blur correction lens 210c may be added to the initialization process 75.

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

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

The present invention is not limited to the above-described embodiment as long as the features of the present invention are not impaired, and other embodiments considered within the scope of the technical idea of the present invention are also included within the scope of the present invention. ..

1 ... Camera, 100 ... Camera body, 101 ... Lens mount, 102 ... Holding unit, 103 ... Body control unit 117 ... Body side first communication unit, 118 ... Body side second communication unit, 121 ... Initialization status reception unit , 122 ... Driven state receiver, 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 Status transmission unit 222 ... Driven state transmission unit 223 ... Initialization control unit

The present invention relates to accessories and interchangeable lenses.

The accessory according to the first aspect of the present invention is an accessory that can communicate with the camera body, and is a first driven member whose state changes by receiving a driving force and a second member whose state changes by receiving a driving force. When the initialization process of the first driven member, the initialization unit for executing the initialization process for the first driven member and the second driven member, and the initialization process of the first driven member are completed. A control unit that starts drive control of the first driven member regardless of whether or not the initialization process of the second driven member is completed.
The accessory according to the first aspect is an interchangeable lens according to the second aspect of the present invention.

Claims (1)

The mounting part where the camera body can be attached and detached, and
Multiple driven members whose state changes in response to the driving force,
An initialization unit that executes an initialization process for at least one of the plurality of driven members,
A first communication unit that transmits initialization status information indicating that the initialization process has been completed to the camera body via the first transmission line in response to an initialization status request from the camera body.
A second communication in which at least one driven state of the plurality of driven members is transmitted to the camera body in a first predetermined cycle via a second transmission line different from the first transmission line. Department and
Interchangeable lens with.

Images