Close-up lens assembly incorporating a photo-ranging system

Details Close-up lens assembly incorporating a photo-ranging system Close-up lens assembly incorporating a photo-ranging system

1993-12-23

1995-09-05

Gellner, Michael L.

354132, 3541491, 35419512, G03B 1320, G03B 1503, G03B 118

Patent

active

054483239

ABSTRACT:
A plurality of fixed focus exposure lenses are mounted in a turret for manual selection of a desired focus. Each exposure lens in the turret is combined with a pair of ranging lenses for movement therewith which direct light beams to converge at the sharpest subject focus distance of the exposure lens.

REFERENCES:
patent: 3416426 (1968-12-01), Land
patent: 3418908 (1968-12-01), Land
patent: 4777501 (1988-10-01), Caimi et al.
patent: 4828383 (1989-05-01), Kunishige et al.
patent: 4914460 (1990-04-01), Caimi et al.
patent: 5142299 (1992-08-01), Braun

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