Hi there! Today i just got a Canon FD mount 50mm F1.4 manual lens..sadly it didn't come with lens cap front and back. I did google for some info on the size..and i learnt its a 52mm filter size.. okay here is the strange part..i do have a 14-45mm panny lens with 52mm filter size..i used it on the Canon's but too small for the filter to be fit..so happens i got a spare 55mm filter and it fits just nice...(confused....zzz) so what size should this canon fd lens be? anyone have the similar lens ..can let me know? here says 52mm.. Canon FD 50mm standard lenses here says 55mm... Canon FD 50mm f/1.4 S.S.C. | Canon | FD Review but then..mine look like this.. Pic link. http://i.imgur.com/GBWE7.jpg hope i can get some answers..this lens is naked without any caps ATM..