Large aperture extended range zoom lens

Details Large aperture extended range zoom lens Large aperture extended range zoom lens

1978-09-21

1980-10-28

Clark, Conrad J.

G02B 1518

Patent

active

042303974

ABSTRACT:
Disclosed is an optical design for a variable focal length lens of large effective aperture which is focusable over an extended range including the "macro" range and is provided with a high degree of correction.

REFERENCES:
patent: 3773402 (1973-11-01), Gela et al.
patent: 3784285 (1974-01-01), Watanabe
patent: 4062621 (1977-12-01), Fleischman

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