Hello. Many years ago I removed the UVa filter from my good old black first version Summicron 90mm...shooting with Tri-X, wide open aperture and even with it's hood extended when cross light "caught" the filter glass there was a tendency to flare.Removal of the filter helped.I intend to keep the lens.

Do any users of later Summicron 90 designs,even the current Apo,experience any potential flare is increased with filter attached? Regards.

-- Sheridan Zantis (albada60@hotmail.com), February 08, 2002