Zoom viewfinder with fixed size moving window

U.S. Patent Number: 5300977

Abstract: A compact Galilean-type zoom finder suitable for compact cameras, and the like whose zoom ratio is about 2. The zoom finder is comprised of four units having negative, negative, positive and negative refractive powers in order from an object side and a movable fixed aperture framing window. The first and the fourth lens units are fixed and the second and the third lens units are moved to perform zooming. The moving framing window helps to delineate the field of view.

Inventors: Lewis; Alan E. (Rochester, NY); Ruben; Paul L. (Penfield, NY)

Assignee: Eastman Kodak Company (Rochester, NY)

Application Number: 07/938,798

Issued: 1994-04-05

Expired: 2006-04-05

Classes: 396/379 ; 359/644; 359/738

Field of search: 354/219,222 359/643,644,676,686,738,739,740,781,894

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