I just bought a Fujinon-SF 250 mm lens on ebay and after I received it, saw that there are several different aperture scales on it. One is in the normal white lettering, one is in red and the third is in yellow. What are the red and yellow scales for?
There is also a large screw in separator for use between the shutter and the board, I presume. When using the lens for portraiture, should this separator be used?
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