Patent ID: 6430375
Filing Date: 2002-08-06
Classification: G03B

Abstract:
A finder optical system of a single lens reflex camera, comprising:a relay optical system that forms a second image by erecting an inverted first image formed on a first image plane through a taking lens of a camera, said relay optical system including a condenser lens, a reflecting prism and a relay lens arranged in the order from said first image plane toward an eyepoint; and a magnifying optical system through which said second image is observed under magnification, wherein the following conditions (1) and (2) are satisfied; (1) 0.25g|<0.35 (2) 0.752/f3<0.85 where, mr is magnification of said relay optical system, f2 is a focal length of said relay lens, and f3 is a focal length of said magnifying optical system.