I'm new to MF. I just purchased a late model 80mm CF T* lens from KEH to replace an earlier version that came with my "kit" and has some cleaning marks that can create flare when shooting at an angle to the light source. The new lens is in "like-new" condition. I'd like to put a UV-type filter on it. Unlike my 35mm Nikkors, this lens does not seem to use a threaded filter. Does anyone know what type of filter do I need? Oh, BTW, I know a lot of folks hate UV filters etc. I don't care about that issue. I prefer to protect my glass with such a filter as a prophylactic. Thanks for your help.