http://www.ebay.com/itm/smc-PENTAX-FA-50mm-f-1-7-Exc-/221204147488?pt=Camera_Lenses&hash=item3380cb6d20
This one is new for me. I have never seen a FA50/1.7 with lock screw. It isn't even listed at http://www.bdimitrov.de/kmp/lenses/primes/normal/index.html , but the user manual in the picture suggest it is made by Pentax. Does someone here know more about it? Stig Vidar Hovland -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.