I'm trying to save some money by buying a legacy lens. Here are my requirements: 1. Around $100 2. Smallish (it will be on my portable PM2) 3. At least f1.8, would pay more for 1.4 or 1.2 4. SHARP! I've done some reading and have found a few 50mm f1.4s that I like: Olympus, Minolta, & Pentax. Any idea which of these would be sharpest? I've heard the Pentax but the Min & Oly seem easier to find. Any of the focus closer? Also, for the Pentax I'd use an M42-m4/3s converter. OM-Mount converter for the Olympus. Any links to a high quality converter that isn't going to damage the mount on my beloved PM2 would be appreciated. Thank you!