Zoom lens

Details Zoom lens Zoom lens

1984-12-17

1987-04-21

Corbin, John K.

350432, G02B 964, G02B 1514

Patent

active

046591885

ABSTRACT:
A zoom lens having a range of equivalent focal lengths extending from a range below the dimension of the diagonal of the image frame to a dimension substantially above and having a zooming range of up to six to one or greater where the lens has a plus, minus, plus, plus lens unit configuration with a strongly negative second lens unit and a fourth lens unit designed to have a given power and telephoto ratio to compensate for a remote aperture stop located in the third lens unit.

REFERENCES:
patent: 4256381 (1981-03-01), Kreitzer

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