MAGNIFICATION_COMPENSATING_DARK_ROOM_TIMER

Published:2009/7/21 4:07:00 Author:Jessie | From:SeekIC

Pushbutton timer provides automatic compensation of exposure time with magnification of negative.-J. Markus and V. Zeluff, Handbook of Industrial Electronic Control Circuits, McGraw-Hill, N.Y., 1956, p 296.



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