I have finally gotten my Olympus 45mm f/1.8, so I have decided to let my precious Pentax 50mm f/1.4 go.. sniff.. There are many variation of Pentax 50mm f/1.4 lenses, so let me give you the full description. It is Asahi Pentax SMC Pentax-M 1:1.4 50mm full manual prime lens with PK mount. It is in excellent condition and the focus ring operates gorgeously smooth. If you own any type of mirrorless camera system, this is a perfect lens for you! Awesome for video. I have a PK to M43 mount from Fotasy with a quick release. So if you want just the lens, it is $100 paypaled and shipped to your door (Only Con. US). If you want both the lens and the M43 mount, then it is $120 paypaled and shipped to your door (Again only Con. US). Here are some photos of the lens. Thanks for stopping by!