A SINGLE LENS REFLEX CAMERA CAPABLE OF OPEN APERTURE PHOTOMETRY AND APERTURE STOP PHOTOMETRY

摘要

A single lens reflex camera, on which can be mounted both types of interchangeable lenses for open aperture and aperture stop photometry, is provided with a mechanism. This mechanism enables to operate open aperture photometry or aperture stop photometry selectively, even when an interchangeable lens for open aperture photometry is mounted on a camera.