Zoom lens capable of macro-photography

Details Zoom lens capable of macro-photography Zoom lens capable of macro-photography

1980-05-15

1982-06-15

Henry, Jon W.

G02B 710

Patent

active

043347371

ABSTRACT:
A zoom lens capable of macro-photography includes first and second movable lenses coupled to first and second cam rings, respectively. The first and second cam rings are operatively associated so that they rotate as a unit about the optical axis of the lens to axially move the first and second lenses for zooming, but are capable of relative axial movement with respect to one another at any point within the zooming range of the lens to move one lens relative to the other lens for macro-photography.

REFERENCES:
patent: 3731987 (1973-05-01), Iida et al.
patent: 3765748 (1973-10-01), Mito
patent: 3980398 (1976-09-01), von Belvard
patent: 4099847 (1978-07-01), Ito

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