Leitz Rouy-Photrometer
Deze Leitz NY Rouy-Photrometer is een zeldzaam item in prachtige staat.
Informatie over dergelijke apparaten van Leitz gevonden in het Engels:
“New Leitz products of the time between WWI and WWII included a biological polarization microscope and the photometer, a device that measured illumination. The photometer was designed by Max Berek, a microscope expert who had worked for Leitz since 1912 and developed the very successful f/3.5 Elmar lens for the original Leica camera.
