| http://www.w3.org/ns/prov#value | - A camera having a photographing optical system including a photographic lens and a film plane, a focus detecting optical system, and a finder optical system, comprising:a swing-up type instant-return mirror composed of a half mirror, pivotally mounted in a mirror box; a reflecting member mounted in said mirror box, located directly before said film plane when said instant-return mirror is placed o
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