Zoom lens

Details Zoom lens Zoom lens

1984-04-06

1986-12-16

Corbin, John K.

G02B 1516

Patent

active

046292918

ABSTRACT:
A zoom lens having a range of equivalent focal lengths from a dimension below the diagonal of the image frame to above with a zoom ratio of substantially three to one or greater having a second negative lens unit of relatively strong optical power where the second lens unit comprises a negative component, a positive meniscus concave to the object and a doublet including a positive element convex to the object and the optical power of the positive element of said doublet is substantially greater than the optical power of said positive meniscus.

REFERENCES:
patent: 2847907 (1958-08-01), Angenieux
patent: 4449791 (1984-05-01), Terasawa et al.

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