Patent ID: 6917470

Claim:
An observation optical apparatus for observing an image of an object, said apparatus comprising: an erecting prism; a front optical system arranged on the light incidence side of said erecting prism; a rear optical system arranged on the light emission side of said erecting prism; a sensor for detecting a shake of said apparatus; and a correction system for correcting a shake of the image due to the shake of said apparatus, by using (a) an output from said sensor and (b) a shake correction optical system in said front optical system, wherein said front optical system includes a plurality of lens elements, and said rear optical system includes a plurality of lens elements, wherein the number of the lens elements of said rear optical system is greater than that of the lens elements of said front optical system, and wherein said shake correction optical system is arranged between (a) said erecting prism and (b) the closest one to the side of said object among said plurality of lens elements of said front optical system.