Single-lens reflex camera, SLR surveillance camera, and exposure method of single-lens reflex camera

摘要

A single lens reflex camera including a mirror-slit unit provided between a photographing lens and a recording medium and being provided with a pair of mirrors which can be selectively moved onto an optical axis of the photographing lens, and a slit provided between the mirrors; a reciprocally sliding mechanism which reciprocally moves the mirror-slit unit with respect to the recording medium, so that the slit gives the light to a picture area of the recording medium; and a photographing control mechanism which controls the reciprocally sliding mechanism, so that upon viewing, the mirrors of the mirror-slit unit are selectively moved onto the optical axis of the photographing lens so as to make the light incident upon a finder optical system, and upon photographing, the slit moves with respect to the picture area of the recording medium to make light, of an object to be photographed, incident upon the recording medium. The invention is also directed to an exposure method in the single lens reflex camera.