Vintage Olympus Pens use this size as well as 43 & 43.5 Olympus E Zuiko 25 f2.8 Olympus Pen Zuiko 28 f3.5 Olympus Pen EED Zuiko 28 f3.5 Olympus Pen SD Quiko 30 f2.8 22.5 Olympus UV chrome...nft...n/o ... 12.00 22.5 Hoya UV ...n/o ...12.00 22.5 Hoya skylight...nft...n/o ...12.00 22.5 Hoya skylight...n/o ... 12.00 22.5 Hoya K2 yellow 8...nft...n/o ...12.00 22.5 Hoya G Orange 16...nft...n/o ...12.00 22.5 Hoya X1 green 11...nft...n/o ... 12.00 22.5F > series 5 adapter Tiffen...u/m... 8.00Index.html