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Optical Engineering

Dual Magnification Viewfinder
Author(s): I. Powell
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Paper Abstract

The design of a camera viewfinder having dual magnification is described. Dual magnification means two modes of operation: (1) the "normal" mode in which the actual filming takes place and (2) the "focus" mode in which critical focusing is carried out. This type of viewfinder is ideally suited to camera systems that have large field formats, making it difficult for the user to view the entire field of view instantaneously yet still focus the image exactly on the film.

Paper Details

Date Published: 1 January 1986
PDF: 5 pages
Opt. Eng. 25(1) 251184 doi: 10.1117/12.7973798
Published in: Optical Engineering Volume 25, Issue 1
Show Author Affiliations
I. Powell, National Research Council Institute of Optics (Canada)

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