Wide angle objective

Details Wide angle objective Wide angle objective

1974-07-29

1976-08-17

Sacher, Paul A.

350176, 350255, G02B 964, G02B 710

Patent

active

039750906

ABSTRACT:
A wide angle lens of the retrofocus type comprising six lens groups in front and rear groupings. The rear grouping is movable forward while the front grouping is stationary to focus the lens to within ten equivalent focal lengths of the lens.

REFERENCES:
patent: 2503789 (1950-04-01), Wood et al.
patent: 3736049 (1973-05-01), Shimizu
patent: R27799 (1973-10-01), Shimizu

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