Originally Posted by
ic-racer
The 75mm and 65mm lens came in two different lensboards. The older gray lensboard was flat. The newer lensboard in wrinkle black is recessed. When using the rangefinder, both boards should work fine (when set at the appropriate infinity stop) If you own both the 65mm and 75mm realize that they share the same infinity stop (without room for another infinity stop so close). Therefore, you need to have both mounted the same type of lens board so they have the same flange-focal distance. If you don't use the rangefinder, none of that matters and the recessed board makes using view-camera movements a little easier.
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