Carl Zeiss Jena 50mm 1.8 M42 screw mount for a Pentax 50mm | Location: USA | Ships: USA Buy & Sell Listing - Want to TradeTrading Carl Zeiss Jena 50mm 1.8 M42 screw mount for a Pentax 50mm Location USA Ships to USA Description I have a Carl Zeiss Jenna 50mm 1.8. It's the same as this lens: http://www.pentaxforums.com/userreviews/carl-zeiss-jena-50mm-1-8-pancolar-mc.html I already have other 50mms, and this is a nice lens -- good color, but I think I'd like to try one of those "warm" (read yellowish) Pentax 50mm 1.4 screw mount lenses. Let me know if you are interested in trading. I might also consider a Pentax m42 135mm lens. There could be cash in one direction or another, depending. Trade with someone with history on fredmiranda or Amin's boards References mu-43, fredmiranda, etc. Acknowledgment I have read and agree to the Buy and Sell rules.