Finder optical system

Details Finder optical system Finder optical system

1993-06-18

1996-02-27

Nguyen, Thong Q.

Optical: systems and elements

Compound lens system

Variable magnification

359422, 359691, 354222, 354224, G02B 2300, G03B 1310

Patent

active

054953650

ABSTRACT:
A finder optical system includes an objective system having a positive refracting power, a reflecting member having a field frame of variable shape, for erecting an image, and an eyepiece system having a positive refracting power. At least one positive lens unit of the eyepiece system is moved along the optical axis, and at least one positive tens unit is inserted in the optical path of the eyepiece system. The magnification of the finder optical system can thus be increased.

REFERENCES:
patent: 4131354 (1978-12-01), Hagiwara
patent: 5144349 (1992-09-01), Kato et al.
patent: 5227824 (1993-07-01), Yoshida et al.
patent: 5255030 (1993-10-01), Mukai et al.
patent: 5257055 (1993-10-01), Cho et al.
Hideyuki Abe, "Making Of Picture Of Panoramic Photograph", Photographic Industries, Shashin Kogyo Publishing Co., Ltd. vol. 49, No. 2, Feb. 1991.

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