SCHNEIDER-KREUZNACH 150MM 4.5 XENAR 4x5 lens

[anthonym3]

I have bought a 1970 150 mm 4.5 synchro-COMPUR and have questions. First what is the quality of the lens, second there is an approximately 1mm round very faint smudge or possibly fungus in the center of the rear element, will this have an effect upon images?

[philbirch]

Its unlikely to have a noticeable impact on quality. But fungus spreads. Clean it off best you can with hydrogen peroxide. If its in the lens itself, it can be halted by exposure to UV light