Electronic Dodging Makes Clearer Pictures
Chemical & Engineering News · 1960
Electronic dodging—a fast way to control contrast in pictures—may give industrial photography a shot in the arm. With it, you can make pictures with faithful reproduction of details to speed up plant design, improve research record keeping, get more data from electron diffraction, electron microscopy, medical x-rays, and the like, says developer LogEtronics, Inc., Alexandria, Va. Dodging, as the term is used by photographers, is a,way to compensate for over- and underexposed areas in negatives during printing. Usually done manually, it consists of varying the amount of light hitting the paper in proportion to the degree of exposure of the various parts of the negative. You do this by holding your hand or any other opaque material over the part of the picture that is overexposed during part of the printing period. The LogEtron does this electronically, the company says. It uses a point light source from a cathode ...