Four component compact zoom lens

Details Four component compact zoom lens Four component compact zoom lens

1987-07-13

1988-07-12

Corbin, John K.

350425, G02B 1514, G02B 934

Patent

active

047566094

ABSTRACT:
A compact zoom lens comprising four components each movable axially to vary the focal length through a range of at least 2.5:1. There is a front negative, a positive component, a positive cemented doublet component and a rear negative component comprising three elements. A diaphragm is mounted with the first-mentioned positive component.

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patent: 4437732 (1984-03-01), Ishiyama
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