Photocopying – Projection printing and copying cameras – Focus or magnification control
Patent
1982-02-18
1984-02-28
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Focus or magnification control
350254, 352142, 354286, G03B 2752
Patent
active
044339070
ABSTRACT:
An adjustable lens mounting device is provided in a photographic enlarger apparatus for adjusting the pitch and roll of the lens stage to achieve optimum alignment of a lens element therein. Pitch adjustment is provided by a pair of elements having complementary convex-concave longitudinal surfaces that are connected together for rotational movement. Roll adjustment is provided by a pair of elements connected together in planar face to face alignment for pivoting about a central point. The adjustable lens mounting device incorporates a lens holder which permits rotation of a screw-coupled lens element relative to the lens stage, so that it may be selectively rotatively positioned for convenient viewing. Also provided is a rotatable turret for selectively carrying a plurality of lens elements in and out of the optical axis.
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Berkey Photo, Inc.
Wintercorn Richard A.
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