| 摘要 |
<p>PURPOSE:To facilitate the setting operation for a long-time photographing by detecting the shutter release operation of a camera by a camera accessory and sending a signal corresponding to the shutter release signal to the camera. CONSTITUTION:A back circuit BCKC is provided with an operation function for exposure control of a camera body BD or the like and is provided on a camera rear cover, and the rear cover is attached to and detached from the body BC replacably. An exposure time longer than a desired time is set to the rear cover (accessory). Then, a command signal sending means sends a bulb photographing command signal to the body BD in response to the exposure time. When the shutter release operation is performed in the body BD, an operation signal is sent to the rear cover; and when this signal is detected in the rear cover, the set exposure time is counted, and a signal corresponding to the shutter release operation signal fof the camera is sent continuously to the body BD during the period from the operation start of this counting means to the counting end of the set exposure time. Thus, photographing is terminated in the side of the body BD when the desired exposure time elapses.</p> |
