Patent ID: 6104532
Filing Date: 2000-08-15
Classification: G03B

Abstract:
A real image mode variable magnification finder optical system comprising, in order from an object side:an objective system having a positive refracting power;a correctly erect image forming system having a plurality of reflecting members, said correctly erect image forming system converting an intermediate image formed by said objective system into a correctly erect image; andan eyepiece system having a positive refracting power,wherein said objective system includes movable lens units moving in accordance with magnification change from a wide position through a telephoto position, anda light interrupting member is disposed on an object side of a most object-side movable lens unit of said objective system at a fixed position during the magnification change, said most object-side movable lens unit being moved in a range of positions closest to an object during the magnification change, with a following condition being satisfied:D.sub.T >D.sub.Wwhere D.sub.T is a distance between said light interrupting member and said most object-side movable lens unit when the finder optical system is adjusted to the telephoto position, and D.sub.W is a distance between said light interrupting member and said most object-side movable lens unit when the finder optical system is adjusted to the wide position.