| 摘要 |
In a film back exchangeable camera provided with a camera body, an exchangeable film back is removably attached to the camera body. A light shielding member is removably attached to the film back so that the light shielding member prevents a film in the film back from being exposed when the light shielding member is attached to the film back, and so that the film is permitted to be exposed when the light shielding member is removed from the film back. The camera further includes film back attachment detecting means for detecting attachment of the film back to the camera body, light shielding member attachment detecting means for detecting attachment of the light shielding member to the film back, release lock means for switching a shutter between an operable state and an inoperable state; and viewfinder lock means for switching a viewfinder between an observable state and an unobservable state, so that the shutter being brought into the inoperable state by the release lock means and the viewfinder is brought into the unobservable state by the viewfinder lock means when attachment of the film back to the camera body is detected by the film back attachment detecting means and attachment of the light shielding member to the film back is detected by the light shielding member attachment detecting means.
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