Reflex zoom lens barrel

Details Reflex zoom lens barrel Reflex zoom lens barrel

1982-02-17

1984-05-01

Henry, Jon W.

350427, 350444, G02B 1516, G02B 1708, G02B 710

Patent

active

044457561

ABSTRACT:
A reflex zoom lens barrel comprising a front frame which carries reflex optical lens means having a positive focal length, a rear frame which carries transmission optical lens means having a negative focal length, zooming means for moving the front and rear frames in optical axial direction, to vary a focal length of a combination of the reflex and transmission optical lens means, and focusing means for independently moving only the front frame in the optical axial directions.

REFERENCES:
patent: 3529888 (1970-09-01), Buchroeder
patent: 3889282 (1975-06-01), Hashimoto
patent: 4128305 (1978-12-01), Liu
patent: 4171880 (1979-10-01), Mori et al.
patent: 4273425 (1981-06-01), Canzek

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