The 35mm and both 50mm lenses were dual range. The normal range-- 3 feet to -- is coupled to the camera rangefinder. By releasing a pin in the lens barrel, close range focusing--3 to 1.5 feet-- is enabled, but not coupled. Kodak provided an optional Close Range and View Finder unit (below) that handled this range. It was parallax-corrected and was supplied with an additional optical unit that slipped over the front camera rangefinder window.
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12/30/2010 16:45