- Hoya 22.5mm 82A filter - Zeiss Ikon 22.5mm Red filter - Made in Germany - Hoya 22.5mm 80B filter - Hoya 22.5mm 81A filter - Panchromar E22.5 Yellow Filter - Hoya 22.5mm 81B filter - Hoya 22.5mm NDx2 (ND2) filter The glass is in good condition. I was using them on my Olympus Pen half frame cameras. This size is extremely difficult to find.