Patent ID: 6643460
Filing Date: 2003-11-04
Classification: G03B

Abstract:
A camera comprising:a semi-transmissive reflecting member that reflects part of a light flux from a photographic optical system to an observation optical system and transmits another part of the light flux to be a light flux for focal point detection; a reflecting member comprising a concave mirror that reflects the light flux for focal point detection having been transmitted through said semi-transmissive reflecting member; a focal point detection apparatus, with a focal point detection optical system having apertures, that detects a focal adjustment state of a subject image formed by said photographic optical system by using the light flux for focal point detection having been reflected by said reflecting member; and a correction optical system, within an optical path between said semi-transmissive reflecting member and said reflecting member, that deflects the directions along which reverse-projected images of said apertures are projected backward toward said photographic optical system by said reflecting member to adjust a position of the reverse-projected images of said apertures, which have been formed on an exit pupil of said photographic optical system and have been offset from an optical axis of said photographic optical system, in relation to a direction in which said reverse-projected images have been offset.