1990 Edition, January 1, 1990
35 mm Planetary Cameras (Top-Light) - Procedures for Determining Illumination Uniformity of Microfilming Engineering Drawings
Includes all amendments and changes through Amendment 1, 1998
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Description / Abstract:
This standard specifies the minimum test target elements and their
criteria to be used in determining the uniformity of illumination on the
copyboard of a 35 mm planetary camera. The layout of the test target
and the procedure to be followed in obtaining a uniform density of
microfilm images from a planetary camera are established to assist in
the achievement of high quality first-generation silver-gelatin
microfilm of engineering drawings.