Camera, accessory, and camera system
A camera includes a camera control unit configured to acquire information on an accessory mounted on the camera by performing communication with an accessory control unit included in the accessory and to control a photographing operation based on the information on the accessory. When the camera control unit acquires, from the accessory control unit, first information that is required prior to start of photographing and second information that is required prior to generation of image data after the start of photographing, if the camera control unit determines that a photographer has performed an operation to start a photographing operation during a period in which the camera control unit is performing communication to acquire the second information, the camera control unit executes a photographic sequence in priority to acquiring the second information and thereafter acquires the second information.
1. A camera comprising:
a camera control unit configured to acquire information on an accessory mounted on the camera by performing communication with an accessory control unit included in the accessory and to control a photographing operation based on the information on the accessory,
wherein, when the camera control unit acquires, from the accessory control unit, first information that is required prior to start of photographing and second information that is required prior to generation of image data after the start of photographing, if the camera control unit determines that a photographer has performed an operation to start a photographing operation during a period in which the camera control unit is performing communication to acquire the second information, the camera control unit executes a photographic sequence in priority to acquiring the second information and thereafter acquires the second information.
2. The camera as claimed in claim 1 ,
wherein, when the camera control unit acquires, from the accessory control unit, the first information and the second information, if the camera control unit determines that a photographer has performed an operation to start a photographing operation during a period in which the camera control unit is performing communication to acquire the second information, the camera control unit executes a photographic sequence in priority to acquiring the second information and thereafter acquires the second information when distance measurement is not executed, when stop-down light measurement is not executed, or when exposure is performed.
3. An accessory comprising:
an accessory control unit configured to perform communication with a camera control unit included in a camera having the accessory mounted thereon and to transmit information on the accessory to the camera control unit,
wherein the accessory control unit stores first information that is required prior to start of photographing and second information that is required prior to generation of image data after the start of photographing, and, if the camera control unit determines that a photographer has performed an operation to start a photographing operation during a period in which the accessory control unit is performing communication to transmit the second information, the accessory control unit interrupts transmission of the second information and thereafter resumes the transmission of the second information.
4. The accessory as claimed in claim 3 ,
wherein the accessory is either of a photographic lens or a flash unit.
5. A camera system comprising:
a camera having a camera control unit; and
an accessory having an accessory control unit,
wherein the camera control unit is configured to acquire information on the accessory mounted on the camera by performing communication with the accessory control unit included in the accessory and to control a photographing operation based on the information on the accessory, and
wherein the accessory control unit is configured to perform communication with the camera control unit included in the camera having the accessory mounted thereon and to transmit information on the accessory to the camera control unit,
wherein, when the camera control unit acquires, from the accessory control unit, first information that is required prior to start of photographing and second information that is required prior to generation of image data after the start of photographing, if the camera control unit determines that a photographer has performed an operation to start a photographing operation during a period in which the camera control unit is performing communication to acquire the second information, the camera control unit executes a photographic sequence in priority to acquiring the second information and thereafter acquires the second information, and
wherein the accessory control unit stores the first information and the second information, and, if transmission of the second information to the camera control unit is interrupted, the accessory control unit thereafter resumes the transmission of the second information.
6. A camera comprising:
a camera control unit configured to acquire information on an accessory mounted on the camera by performing communication with an accessory control unit included in the accessory and to control a photographing operation based on the information on the accessory,
wherein, when the camera control unit acquires, from the accessory control unit, first information of a focal length or an F-number of the accessory and second information of name information or aberration information of the accessory, if the camera control unit determines that a photographer has performed an operation to start a photographing operation during a period in which the camera control unit is performing communication to acquire the second information, the camera control unit executes a photographic sequence in priority to acquiring the second information and thereafter acquires the second information.
7. The camera as claimed in claim 6 ,
wherein, when the camera control unit acquires, from the accessory control unit, the first information and the second information, if the camera control unit determines that a photographer has performed an operation to start a photographing operation during a period in which the camera control unit is performing communication to acquire the second information, the camera control unit executes a photographic sequence in priority to acquiring the second information and thereafter acquires the second information when distance measurement is not executed, when stop-down light measurement is not executed, or when exposure is performed.
8. An accessory comprising:
an accessory control unit configured to perform communication with a camera control unit included in a camera having the accessory mounted thereon and to transmit information on the accessory to the camera control unit,
wherein the accessory control unit stores first information of a focal length or an F-number of the accessory and second information of name information or aberration information of the accessory, and, if the camera control unit determines that a photographer has performed an operation to start a photographing operation during a period in which the accessory control unit is performing communication to transmit the second information, the accessory control unit interrupts transmission of the second information and thereafter resumes the transmission of the second information.
9. The accessory as claimed in claim 8 ,
wherein the accessory is a photographic lens.