JP4444530B2 - camera - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention detects an operation error during camera operation.Camera that stores detected error informationAbout.
[0002]
[Prior art]
When the camera has an error detection unit that detects an operation error during camera operation and an error storage unit that stores the error information, it responds to the content of the operation error when the error detection unit detects an operation error during camera operation. A method for storing the error number in the error storage unit and an error history that can store an error number corresponding to the content of the operation error for a predetermined number of times are already known in the art.
[0003]
[Problems to be solved by the invention]
However, the error cause cannot be specified in a camera system in which a plurality of recent external accessories (such as a photographing lens and a flash) can be mounted only by storing the error number in the error storage unit as described above.
[0004]
For example, in a camera system that supplies power to a photographic lens that can be attached to and detached from the camera, if there is a malfunction on the photographic lens side that affects the power source on the camera side and a power error occurs, the error is analyzed along with the photographic lens. Then, the cause can be specified, but if the photographing lens is removed, the cause of the error cannot be specified.
[0005]
  In addition, external accessories such as photographic lenses are generallyMultiple usersBecause it is owned, even if it is known that the photographic lens is in error, it cannot be analyzed unless it can be identified which photographic lens.
[0007]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a camera which can easily analyze an error by specifying which accessory is related even when an error occurs in an attached external accessory.
[0010]
[Means for Solving the Problems]
  To achieve the above objectiveThe camera of the present invention is a camera to which at least one or more external accessories can be attached and detached, and an external accessory detection means for detecting the external accessories attached to the camera, and an operation that occurs during operation of the camera Error detection means for detecting an error, error information corresponding to the operation error when the error detection means detects the operation error, and at that time being attached to the camera by the external accessory detection means Storage means for storing information corresponding to the external accessory from which is detected.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on illustrated embodiments.
[0015]
<Embodiment 1>
FIG. 1 is a block diagram showing a circuit configuration of a camera according to Embodiment 1 of the present invention.
[0016]
This camera has a microcomputer (hereinafter referred to as a microcomputer) 1 that controls each operation of the camera body. The microcomputer 1 includes a switch input circuit 3 for detecting a switch group 2 for various operations, a photometric circuit 4 for measuring a subject by a photometric sensor 4a, and autofocus (AF) using an existing phase difference detection method. A focus detection circuit 5 having a circuit unit for storing and reading the area sensor 5a, a feeding motor control circuit 6 for driving a film feeding motor (not shown), and a shutter (not shown) are controlled. A shutter control circuit 7 for performing the operation, a battery check circuit 8 for checking a voltage state of a battery (not shown) of the camera, a liquid crystal display circuit 9 for displaying each shooting information of the camera on a liquid crystal display unit (not shown), A strobe light emission dimming control circuit 10 for controlling light emission dimming of a strobe (not shown) is connected. To control the work.
[0017]
The switch group 2 includes SW1 (photometry and distance measurement operation start switch by half-pressing the shutter release button), SW2 (release switch), and the switch state of the switch group 2 is detected by the switch input circuit 3. Is input to the microcomputer 1.
[0018]
The photometric circuit 4 inputs the photometric information measured into the microcomputer 1, and the microcomputer 1 performs A / D conversion on the plurality of input photometric outputs, and sets the exposure conditions (aperture and shutter speed).
[0019]
The focus detection circuit 5 inputs the detected focus information to the microcomputer 1, and the microcomputer 1 controls a lens control circuit 13 that moves a lens group (not shown) of the photographing optical system based on the input focus information.
[0020]
The feed motor control circuit 6 drives a feed motor (not shown) based on a control signal from the microcomputer 1 to feed and rewind the film.
[0021]
The shutter control circuit 7 controls a shutter magnet (not shown) based on a control signal from the microcomputer 1 and performs exposure at a predetermined shutter speed.
[0022]
The battery check circuit 8 applies a load to a battery (not shown) based on a control signal from the microcomputer 1 and outputs a voltage state at that time to the microcomputer 1.
[0023]
The liquid crystal display circuit 9 displays each shooting information of the camera, for example, shutter speed, aperture value, ISO sensitivity, the number of films, and the like on a liquid crystal display unit (not shown) based on a control signal from the microcomputer 1 so that the photographer can Inform.
[0024]
A strobe light emission dimming control circuit 10 is connected to the microcomputer 1 together with an external flash circuit 11 of a flash (not shown) as an external accessory via an actuator 12, and an internal TTL dimming circuit based on a control signal from the microcomputer 1. And the light emission stop function by TTL dimming for notifying the external flash circuit 11 of the light emission stop is controlled.
[0025]
In addition, this camera is a type of camera in which a lens barrel (not shown) having a photographic lens (not shown) is detachable. The photographic lens (lens barrel) as an external accessory has a focus adjustment of the photographic lens. A lens control circuit 13 for controlling the diaphragm is provided. The lens control circuit 13 is connected to the microcomputer 1 via the lens mount 14 and controls the lens control circuit 13 based on a control signal from the microcomputer 1 to adjust the focus adjustment and the diaphragm of the photographing lens.
[0026]
The microcomputer 1 includes a ROM 1a storing a program for controlling camera operations, a RAM 1b for storing variables, and an EEPROM (electrically erasable and writable memory) 1c for storing various parameters and error information. .
[0027]
Further, the microcomputer 1 can detect error information in the camera operation from the respective signals input from the circuits on the camera body side, the external flash circuit 11 on the external accessory side, and the lens control circuit 13.
[0028]
Next, the camera operation at the time of photographing by the camera according to the present embodiment will be described with reference to the flowchart of FIG.
[0029]
First, the microcomputer 1 initializes internal information by initializing each circuit shown in FIG. 1, reading data from the EEPROM 1c, etc., as an initialization operation of the camera (step S1). At this time, the error number, which is the data in the RAM 1b, is initialized to '00', so that there is no error (step S2).
[0030]
The microcomputer 1 performs a battery check by the battery check circuit 8 and detects a battery (power supply) state (step S3). As a result of the battery check in step S3 (step S4), if the battery voltage value is lower than the predetermined voltage value and the camera operation is affected, the process proceeds to step S5, where the battery voltage value is higher than the predetermined voltage value and the camera operation is performed. If there is no influence, the process proceeds to step S6.
[0031]
In step S5, since the battery affects the camera operation, “01” is input as an error to the error number in the RAM 1b, and the process proceeds to step S6. In step S6, various switch states are read according to information from the switch input circuit 3.
[0032]
Then, it communicates with the external flash circuit 11 via the shoe (connector) 12 (step S7), and receives external flash information (flash mode, charge state, flash power supply state, flash type, etc.). Further, it communicates with the lens control circuit 13 via the lens mount (connector) 14 (step S8), and receives lens information (lens type, lens focal length, open Fno, etc.).
[0033]
In step S9, if the microcomputer 1 determines that there is no failure or problem in steps S7 and S8, that is, if the error number that is the data in the RAM 1b is “00”, it is determined that there is no error and step S11. If the error number is not “00”, it is determined that an error has occurred, and the process proceeds to step S10 where error processing is performed.
[0034]
Next, the error processing in step S10 will be described with reference to the flowchart shown in FIG.
[0035]
When error processing is started, first, an error number is stored in a predetermined area of the EEPROM 1c (step S20).
[0036]
Then, whether or not the photographing lens (not shown) is attached to the camera is checked by a lens attachment confirmation switch (not shown), and if it is determined that the photographing lens (not shown) is attached to the camera, step S23. If it is determined that the photographing lens (not shown) is not attached to the camera, the process proceeds to step S22.
[0037]
In step S22, since the photographic lens is not attached to the camera, lens non-attachment data is stored in a predetermined area of the EEPROM 1c, and in step S23, information on the attached photographic lens is stored in the predetermined area of the EEPROM 1c. .
[0038]
Then, it is checked whether or not a flash (strobe) (not shown) is attached to the camera by flash communication in step S7. If it is determined that the flash is attached to the camera, the process proceeds to step S26, and the flash is connected to the camera. If it is determined that it is not attached to the device, the process proceeds to step S25.
[0039]
In step S25, since the flash is not installed, the flash non-installation data is stored in the determined area of the EEPROM 1c, and in step S26, the information on the installed flash is stored in the determined area of the EEPROM 1c.
[0040]
In order to notify the photographer that an error has occurred due to the above error processing, the liquid crystal display circuit 9 is controlled to display error information on a liquid crystal display unit (not shown) (step S27). End (return) processing.
[0041]
Here, error information stored in the EEPROM 1c according to the mounting state of the external accessories (photographing lens, flash (strobe)) will be described with reference to FIG.
[0042]
When both the photographing lens and the flash are attached to the camera, as shown in FIG. 4A, various data are arranged from the lower address to the higher address in the error storage area of the EEPROM 1c.
[0043]
When the photographing lens is not attached to the camera and the flash is attached, as shown in FIG. 4B, various data are arranged from the lower address to the higher address in the error storage area of the EEPROM 1c.
[0044]
When the camera has a photographic lens attached and a flash has not been attached, various data are arranged from the lower address to the higher address in the error storage area of the EEPROM 1c as shown in FIG. 4C.
[0045]
When both the photographing lens and the flash are not attached to the camera, as shown in FIG. 4D, various data are arranged from the lower address to the higher address in the error storage area of the EEPROM 1c.
[0046]
When the error process in step S10 is completed, the process proceeds to step S19, where the end process is performed and the process ends.
[0047]
If it is determined in step S9 that there is no error, the process proceeds to step S11.
[0048]
In step S11, if SW1 (photometry and ranging operation start switch) by half-pressing a shutter release button (not shown) is turned on, the process proceeds to step S12, and if not, the process proceeds to step S19.
[0049]
In step S12, the subject brightness is measured by the photometry circuit 4, and the shutter speed and aperture value are calculated according to the subject brightness. Further, the distance to the subject is calculated based on the detection signal from the focus detection circuit 5, and the distance to the subject is measured (step S13).
[0050]
Then, based on the distance measurement information calculated in step S13, the lens control circuit 13 is controlled to drive the lens for focus adjustment of the photographing lens. Then, in order to notify the photographer of the shutter speed and aperture value obtained in step S12, the liquid crystal display circuit 9 is controlled and information such as the shutter speed and aperture value is displayed on a liquid crystal display unit (not shown). Display (step S15).
[0051]
If SW2 is turned off by pressing the shutter release button (not shown), the process proceeds to step S18. If SW2 is on, the process proceeds to step S17. In step S17, SW2 is turned on, release processing such as aperture control, shutter control, flash control, and film feed control is performed, and the subject is photographed.
[0052]
In step S18, if SW1 is off, the process proceeds to step S19. If SW1 is not off, the process proceeds to step S6, and the steps after step S6 are repeated.
[0053]
In step S19, as the end process, the changed internal data or the like is stored in the EEPROM 1c or various circuit end processes are performed, and the camera operation is ended.
[0054]
As described above, according to the present embodiment, when an error in camera operation is detected by the microcomputer 1 based on information input from various circuits, information on the attached external accessory is also stored together with an error number corresponding to the error. Therefore, even if an operation error during camera operation occurs due to an external accessory, it is possible to specify which accessory is related with the stored information on the external accessory, and it is possible to easily analyze the error.
[0055]
<Embodiment 2>
Also in this embodiment, the circuit configuration is the same as the circuit configuration of the camera according to Embodiment 1 shown in FIG. 1, and the description thereof is omitted in this embodiment.
[0056]
Hereinafter, the camera operation at the time of shooting by the camera according to the present embodiment will be described with reference to the flowchart of FIG.
[0057]
First, the microcomputer 1 initializes internal information by initializing each circuit shown in FIG. 1, reading data from the EEPROM 1c, etc., as an initialization operation of the camera (step S30). At this time, the error number, which is the data in the RAM 1b, is initialized to '00', so that there is no error (step S31).
[0058]
The microcomputer 1 performs a battery check using the battery check circuit 8 and detects a battery (power supply) state (step S32). As a result of the battery check in step S32 (step S33), if the battery voltage value is lower than the predetermined voltage value and the camera operation is affected, the process proceeds to step S34, where the battery voltage value is higher than the predetermined voltage value and the camera operation is performed. If there is no influence, the process proceeds to step S35.
[0059]
In step S34, since the battery affects the camera operation, "01" is input as an error to the error number in the RAM 1b, and the process proceeds to step S35. In step S35, various switch states are read according to information from the switch input circuit 3.
[0060]
Then, it communicates with the external flash circuit 11 via the shoe (connector) 12 (step S36), and receives external flash information (flash mode, charge state, flash power supply state, flash type, etc.).
[0061]
Then, it is determined whether or not a communication error has occurred during the flash communication in step S36 (step S37). If there is no communication error, the process proceeds to step S39, and if not, the process proceeds to step S38. The communication error determination at the time of communication in step S37 is one of well-known communication error determination processes. The received sum check data is compared with the sum check of the transmitted communication data. .
[0062]
In step S38, since there was a communication error during flash communication, "02" is input as an error to the error number in the RAM 1b, and the process proceeds to step S39.
[0063]
In step S39, communication with the lens control circuit 13 is performed via the lens mount (connector) 14, and lens information (lens type, lens focal length, open Fno, etc.) is received.
[0064]
Then, it is determined whether or not there is a communication error during lens communication in step S39 (step S40). If there is no communication error, the process proceeds to step S42, and if not, the process proceeds to step S41. In step S41, since there was a communication error during lens communication, "03" is input as an error number in the RAM 1b as an error, and the process proceeds to step S42.
[0065]
In step S42, if the microcomputer 1 determines that there is no failure or problem in steps S36 and S39, that is, if the error number that is the data in the RAM 1b is '00', it is determined that there is no error and step S44 is performed. If the error number is not “00”, it is determined that an error has occurred, and the process proceeds to step S43 where error processing is performed.
[0066]
Next, the error processing in step S43 will be described with reference to the flowchart shown in FIG.
[0067]
When error processing is started, first, an error number is stored in a predetermined area of the EEPROM 1c (step S53).
[0068]
In addition, the storage area of the EEPROM 1c for storing error information is configured as shown in FIG. 7A, and in this embodiment, as shown in FIGS. 7B, 7C, and 7D, The accessory data is one of photographing lens data, flash data, and data without accessories.
[0069]
In step S54, if the error number is "01" or "02", the process proceeds to step S58, and if not, the process proceeds to step S55. In step S55, it is checked whether or not a flash (strobe) (not shown) is attached to the camera by the flash communication in step S36. If it is determined that the flash is attached to the camera, the process proceeds to step S57. When it is determined that is not attached to the camera, the process proceeds to step S56.
[0070]
In step S56, since the flash is not installed, the flash non-installation data is stored in the determined area of the EEPROM 1c, and in step S26, information on the installed flash is stored in the determined area (accessory data 1 to 3) of the EEPROM 1c. Remember. In step S57, since the flash is mounted, the flash information is stored in a predetermined area (accessory data 1 to 3) of the EEPROM 1c.
[0071]
In step S58, whether or not a photographing lens (not shown) is attached to the camera is checked by a lens attachment confirmation switch (not shown), and it is determined that the photographing lens (not shown) is attached to the camera. If this is the case, the process proceeds to step S60. If it is determined that the photographing lens (not shown) is not attached to the camera, the process proceeds to step S59.
[0072]
In step S59, since the photographic lens is not attached to the camera, lens non-attachment data is stored in a predetermined area (accessory data 1 to 3) of the EEPROM 1c. In step S60, information on the attached photographic lens is stored in the EEPROM 1c. It memorize | stores in the decided area | region (accessory data 1-3).
[0073]
In order to notify the photographer that an error has occurred due to the above error processing, the liquid crystal display circuit 9 is controlled to display error information on a liquid crystal display unit (not shown) (step S61). End (return) processing.
[0074]
Here, the error information stored according to the mounting condition of the external accessories (photographing lens, flash) in the present embodiment will be described with reference to FIGS. 7 (a), (b), (c), and (d). To do.
[0075]
When the error number is ‘01’, it is a battery error, and the external accessory relates to the photographic lens that is supplying power, so the flash information is not stored, but the photographic lens information is stored. Therefore, if the error number is “01” and the photographic lens is attached to the camera, the data as shown in FIG. 7B is arranged in the error storage area of the EEPROM 1c, and the photographic lens is not attached to the camera. In this case, data as shown in FIG. 7D is arranged in the error storage area of the EEPROM 1c.
[0076]
When the error number is ‘02’, it is a flash communication error, and the external accessory is related to the flash, so the shooting lens information is not stored, but the flash information is stored. Therefore, if the error number is “02” and the flash is attached to the camera, the data as shown in FIG. 7C is arranged in the error storage area of the EEPROM 1c, and the flash is not attached to the camera. Is arranged in the error storage area of the EEPROM 1c as shown in FIG.
[0077]
When the error number is '03', it is a lens communication error, so the external accessory is associated with the photographic lens, so the flash information is not stored, but the photographic lens information is stored. Therefore, if the error number is '03' and the photographic lens is attached to the camera, data as shown in FIG. 7B is arranged in the error storage area of the EEPROM 1c, and the photographic lens is not attached to the camera. In this case, data as shown in FIG. 7D is arranged in the error storage area of the EEPROM 1c.
[0078]
Then, when the error process in step S43 is completed, the process proceeds to step S52, where the end process is performed and the process ends.
[0079]
If it is determined in step S42 that there is no error, the process proceeds to step S44. In step S44, if SW1 (photometry and distance measurement operation start switch) is turned on by half-pressing a shutter release button (not shown), the process proceeds to step S45, and if not, the process proceeds to step S52.
[0080]
In step S45, the subject brightness is measured by the photometry circuit 4, and the shutter speed and aperture value are calculated according to the subject brightness. Further, the distance to the subject is calculated based on the detection signal from the focus detection circuit 5, and the distance to the subject is measured (step S46).
[0081]
Then, based on the distance measurement information calculated in step S46, the lens control circuit 13 is controlled to drive the lens for adjusting the focus of the photographing lens (step S47). Then, in order to notify the photographer of the shutter speed and aperture value obtained in the above step S45, the liquid crystal display circuit 9 is controlled and information such as the shutter speed and aperture value is displayed on the liquid crystal display unit (not shown). It is displayed (step S48).
[0082]
If SW2 is turned off by pressing the shutter release button (not shown), the process proceeds to step S51. If SW2 is on, the process proceeds to step S50. In step S50, SW2 is turned on to perform a release process such as aperture control, shutter control, flash control, film feed control, and the like to photograph the subject.
[0083]
In step S51, if SW1 is off, the process proceeds to step S52. If SW1 is not off, the process proceeds to step S35, and the steps after step S35 are repeated.
[0084]
In step S52, the modified internal data or the like is stored in the EEPROM 1c or various circuits are terminated as the termination process, and the camera operation is terminated.
[0085]
As described above, in this embodiment, when the microcomputer 1 detects an operation error during camera operation based on information input from various circuits, the external accessory information related to the error is determined by determining the error content. By storing only the error, it is possible to easily analyze an error relating to the external accessory even if the recording capacity of the EEPROM 1c is small.
[0086]
<Embodiment 3>
Also in this embodiment, the circuit configuration is the same as the circuit configuration of the camera according to Embodiment 1 shown in FIG. 1, and the description thereof is omitted in this embodiment.
[0087]
Hereinafter, the camera operation at the time of shooting by the camera according to the present embodiment will be described with reference to the flowcharts of FIGS. The present embodiment is the same as the error processing operation in step S43 in the flowchart shown in FIG. 5 according to the second embodiment. In the present embodiment, only the error processing operation will be described.
[0088]
The error history in error processing is to make a mechanism for understanding past errors by storing an error number in a separate storage area every time an error occurs. In this embodiment, as the error history, an error area is configured in the EEPROM 1c as shown in FIG. 9A, and the error information is arranged in the oldest order of the error information. Also, when the error storage area is full, data is erased from the old error information at the lowest address.
[0089]
Next, the error processing of the present embodiment in step S43 of the flowchart shown in FIG. 5 will be described with reference to the flowchart shown in FIG.
[0090]
First, the microcomputer 1 compares the error number of the error that has been stored in the past (the address in FIG. 9A is the highest error) with the error number that occurred this time (step S70), and the error numbers of the two are different. If so, the process proceeds to step S71, and if not, the process proceeds to step S72.
[0091]
In step S71, the error history is updated. Here, the updating method of the present embodiment will be described with reference to FIGS. 9B, 9C, and 9D.
[0092]
FIG. 9B shows error history data, and it is assumed that errors have occurred in the past. If the current error number is “03”, the error number data is moved as shown in FIG. 9C, and the error number data is stored as shown in FIG. 9B to FIG. 9D. Rewrite. By doing so, the latest error history for a predetermined number of times is stored.
[0093]
In step S72, in order to notify the photographer that an error has occurred, the liquid crystal display circuit 9 is controlled to display error information on a liquid crystal display unit (not shown), and the error processing is ended (returned).
[0094]
In this embodiment, when the error number that occurred is the same as the last stored error number as in the above error processing, the error history is not changed because the error is not stored, but this occurred. Needless to say, if the error number is the same as the last stored error number, even if the last error number is overwritten, the error history will not change as a result.
[0095]
As described above, in this embodiment, an error history is stored as an error history for a predetermined number of times, and if the error number at the time of error detection is the same as the last recorded error number, the error history is not changed. As a result, even if the same error continues, the error history will not be filled with only that error.
[0096]
<Embodiment 4>
Also in this embodiment, the circuit configuration is the same as the circuit configuration of the camera according to Embodiment 1 shown in FIG. 1, and the description thereof is omitted in this embodiment.
[0097]
The present embodiment is also substantially the same as the control at the time of error detection of the third embodiment shown in the flowcharts of FIGS. 5 and 8, and a duplicate description is omitted.
[0098]
In the third embodiment, an error area as shown in FIG. 9A is configured, but in this embodiment, an error area is configured in the EEPROM 1c as an error history as shown in FIG. 10A. The three pieces of data from the lower order of the address are arranged as one piece of error information in the oldest order of the error information. Also, when the error storage area is full, data is erased from the old error information at the lowest address.
[0099]
The update method of the present embodiment for updating the error history in step S71 of the flowchart shown in FIG. 8 will be described with reference to FIGS. 10 (b), 10 (c), and 10 (d).
[0100]
FIG. 10B shows error history data, and it is assumed that an error has occurred in the past. Assuming that the current error number is '03', the number indicating the type of the taking lens as the taking lens information attached at that time is '25', and the number indicating the type of the attached flash is '38', The data of these numbers moves as shown in FIG. 10C, and the data storage is rewritten as shown in FIG. 10B to FIG. 10D. By doing so, the latest error history for a predetermined number of times is stored.
[0101]
As described above, in the present embodiment, the operation error is stored as an error history for a predetermined number of times, and if the error number at the time of error detection is the same as the last recorded error number, the error history is not changed. As a result, even if the same error occurs continuously, only that error does not fill the error history.
[0102]
【The invention's effect】
  As explained aboveAccording to the camera of the present invention, even when an error occurs in the attached external accessory, it is possible to specify which external accessory is related to the error, thereby facilitating error analysis.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a circuit configuration of a camera according to Embodiment 1 of the present invention.
FIG. 2 is a flowchart showing a series of operations of the camera according to Embodiment 1 of the present invention.
FIG. 3 is a flowchart showing an operation in error processing of the camera according to Embodiment 1 of the present invention.
FIG. 4 is a diagram for explaining an error storage area of an EEPROM that stores error information according to the first embodiment of the present invention;
FIG. 5 is a flowchart showing a series of operations of the camera according to Embodiment 2 of the present invention.
FIG. 6 is a flowchart showing an operation in error processing of the camera in Embodiment 2 of the present invention.
FIG. 7 is a diagram for explaining an error storage area of an EEPROM that stores error information according to Embodiment 2 of the present invention;
FIG. 8 is a flowchart showing an operation in error processing of a camera in Embodiment 3 of the present invention.
FIG. 9 is a diagram for explaining an error storage area of an EEPROM that stores error information according to Embodiment 3 of the present invention;
FIG. 10 is a diagram for explaining an error storage area of an EEPROM that stores error information according to Embodiment 4 of the present invention;
[Explanation of symbols]
1 Microcomputer (error detection means, error content determination means)
1a ROM
1b RAM
1c EEPROM (memory means)
2 Switch group
3 Switch input circuit
4 Photometric circuit
5 Focus detection circuit
6 Feed motor control circuit
7 Shutter control circuit
8 Battery check circuit
9 Liquid crystal display circuit
10 Strobe flash control circuit
11 External flash circuit
12 Akshu
13 Lens control circuit
14 Lens mount

Claims (3)

At least one or more external accessories are removable cameras,
External accessory detection means for detecting the external accessory mounted on the camera;
Error detection means for detecting an operation error that occurs during operation of the camera;
When the error detection means detects the operation error, it corresponds to the error information corresponding to the operation error and the external accessory detected by the external accessory detection means at that time. And a storage means for storing information to be stored . An external accessory operation state detection means for detecting the operation state of the external accessory;
When the error detection means detects the operation error, the storage means detects error information corresponding to the operation error and that the external accessory detection means is attached to the camera at that time. The camera according to claim 1 , wherein information corresponding to the external accessory and information corresponding to the operation state of the external accessory detected by the external accessory operation state detection unit at that time are stored . When the error detection unit detects the operation error, the error detection unit includes a determination unit that determines whether the detected error information is different from the latest error information stored in the storage unit,
The storage means, when the judgment means judges that the detected error information is different from the latest error information, the error information corresponding to the operation error, and then the external accessory detection means The camera according to claim 1, wherein information corresponding to the external accessory detected to be attached to the camera is stored.

Images