Zooming structure of interchangeable camera lens

Details Zooming structure of interchangeable camera lens Zooming structure of interchangeable camera lens

1979-11-13

1981-01-27

Henry, Jon W.

350255, G02B 710, G02B 1518

Patent

active

042471702

ABSTRACT:
In an interchangeable camera lens having a cam sleeve rotatable by a sliding movement of an operation ring, the cam sleeve comprises a first cam slot for moving lens of variable magnification and a second cam slot for moving lens of focus compensation. The first cam slot has a first rectilinear portion inclined at a predetermined angle with respect to the axial direction of the cam sleeve and a second portion angled from the front end of the rectilinear portion toward the circumferential direction thereof. The second cam slot has a first arc-shaped portion and a second portion angled rearwardly from the end of the arc-shaped portion.

REFERENCES:
patent: 3731987 (1973-05-01), Iida et al.
patent: 3765748 (1973-10-01), Mito
patent: 4114984 (1978-09-01), Muryoi
patent: 4168884 (1979-09-01), Tesch

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