Wollensak 20 INCH (50cm) Mirror Lens Dec 7, 2018 13:15:09 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by kess on Dec 7, 2018 13:15:09 GMT -5 Recent acquisition... 1950'S Mirror lens.. 20 INCH f:6.3 with a M39 mount.... Can anyone tell me about it? Thanks.... Ken Tried to add a photo.... says it's too big