Patent ID: 7734169
Filing Date: 2010-06-08
Classification: G03B

Abstract:
1. A camera comprising: a first imaging medium which acquires subject image data from a subject light flux transmitted through a photographing lens; an optical path branching member which is disposed in an image pickup optical path of the first imaging medium to branch an optical path of the subject light flux; a primary image forming surface on which the subject light flux branched by the optical path branching member forms an image; a second imaging medium which picks up the subject image formed on the primary image forming surface; and a secondary image forming optical system which projects the subject image formed on the primary image forming surface onto the second imaging medium, wherein the following conditions 1 is satisfied: Condition 1: the camera has a finder optical system which is disposed in an optical path in a direction different from that of the first imaging medium and through which the subject image formed on the primary image forming surface is observed, and the camera satisfies the following equation (1): in which ENP 1 is a distance from the incidence pupil of the secondary image forming optical system to the subject image formed on the primary image forming surface along the optical axis, and ENP 2 is a distance from the incidence pupil of the finder optical system to the subject image formed on the primary image forming surface along the optical axis, wherein it is set that an eye point of the finder optical system is disposed at an arbitrary position in a range of 0 to 50 mm from the last surface of the finder optical system toward an observation side, and OBJH is the maximum effective ray height on the primary image forming surface.