COP 75 cause reflected light from the varnish is likely to enter the camera and blacken some part of the negative. A lens of long focus should be employed, for reasons which will be understood by reference to the following diagram, which is exaggerated in its proportions, in order to render it more… … in the negative. Next, suppose a lens of longer focus used, and the picture placed further from it, the image being the same size as before, as shown by the dotted lines ; then no re- flected rays will fall upon the sensitive plate, but they will all pass to the left of the lens. In copying oil…
Photography
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