Zoom viewfinder system for single reflex camera

Details Zoom viewfinder system for single reflex camera Zoom viewfinder system for single reflex camera

1996-05-30

1999-12-21

Nguyen, Thong

Optical: systems and elements

Compound lens system

Telescope

359422, 396377, 396386, G02B 2300, G02B 1310

Patent

active

060057122

ABSTRACT:
A viewfinding system for use with an optical system that creates a first object image includes an objective block which is sealed as a unit. The objective block includes a focusing screen for forming the first object image and relay optics for transmitting the first object image. A zoom block includes a zoom optical system for providing a modification of the magnification of the first object image to provide a second object image. An eyepiece block receives the second object image and includes a reflecting member and an eyepiece through which the second object image is observed. The eyepiece block is sealed and the second object image is realized within the sealed eyepiece block.

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patent: 4999658 (1991-03-01), Kamitani et al.
patent: 5363163 (1994-11-01), Hayashi et al.
patent: 5585965 (1996-12-01), Hayashi et al.

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