Inverted telephoto type wide angle lens system

Details Inverted telephoto type wide angle lens system Inverted telephoto type wide angle lens system

1981-07-30

1984-05-22

Corbin, John K.

G02B 1304

Patent

active

044497938

ABSTRACT:
An inverted telephoto type wide angle lens system is provided. The lens system comprises an aperture stop, a first lens group located at the object side of the aperture stop, and a second lens group located at the image side of the aperture stop, the second lens group including at least two movable focusing lens groups, whereby the focusing is practiced by only the movement of the focusing lens groups with the remaining lens elements in the lens system stationary.

REFERENCES:
patent: 3923369 (1975-12-01), Nakamura
patent: 4025170 (1977-05-01), Kawamura
patent: 4029397 (1977-06-01), Yamashita
patent: 4099849 (1978-07-01), Lawson et al.
patent: 4311367 (1982-01-01), Mori

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