Eastman-Kodak, 1945
Test diagrams of a series of lens elements
IN THIS INSPECTION, RAYS FROM A PINPOINT OF LIGHT, ABOUT 200 FEET AWAY, PASS THROUGH THE LENS ON THE INSPECTION BENCH. EXAMINED THROUGH A POWERFUL MICROSCOPE, THEY APPEAR AS A STAR. IF A LENS FAILS TO BRING THE LIGHT RAYS INTO GOOD FOCUS AT ALL POINTS, THE STAR LACKS SYMMETRY AND DEFINTION. HERE AN EXAMPLE OF A "GOOD" STAR (on the right) AND A "BAD" STAR (left-hand side).
SUCH, AND MANY OTHER, SCIENTIFIC EXPERIMENTS WILL HAVE A BEARING UPON THE FUTURE DICTONARY OF THE COLOUR PHOTOGRAPHER.
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