So, I found this lens: http://cgi.ebay.com/Zeiss-Sonnar-18...7557047853QQcategoryZ3352QQrdZ1QQcmdZViewItem Then I found this adapter: http://cgi.ebay.com/adapter-Pentaco...Z7557622153QQcategoryZ710QQrdZ1QQcmdZViewItem Would this be a good answer to my portrait length lens needs?? Its a little long, I think, but its fast. Suits my needs pretty well, so it seems.... I saw the name Zeiss and got excited, any good, this set up?? Then I found this: http://cgi.ebay.com/pentax-645-npc-...7557387731QQcategoryZ3353QQrdZ1QQcmdZViewItem Anyone know what sort of film, print size this uses/produces??