| 摘要 |
A camera having an aperture value information switchable lens assembly or lens barrel, comprising an information output device provided in the lens assembly for generating lens information. The information output device includes a first information unit for generating nominal aperture value information inherently stored therein, and a second information unit for generating effective aperture value information variable with image magnification. The camera further comprises an information selecting device provided in the lens assembly and connected to the information output device for selecting between the nominal aperture value information and the effective aperture value information, a focusing setting device connected to the information output device, an information transmitting device for transmitting information selected by the information selecting device to a main camera body, and a multifunction electrical circuit mounted in the main camera body for transmitting a control signal to the information output device and processing the lens information received from the information output device.
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