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Publication of SU390739A3publicationCriticalpatent/SU390739A3/ru
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B27/00—Photographic printing apparatus
G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
G03B27/34—Means for automatic focusing therefor
G03B27/36—Means for automatic focusing therefor by mechanical connections, e.g. by cam, by linkage
G03B27/40—Means for automatic focusing therefor by mechanical connections, e.g. by cam, by linkage adapted for use with lenses of different focal length