So, with my used GF1 purchase I also acquired a pair of adapters. I have a Pixco Nikon/m-43 and a Leica M adapter (unbranded). I used a Pentax with manual M42 lenses for a while and I found the whole process very educational. Learning to manually focus taught me a few things. I still consider myself a beginner. I know nothing about MF Nikons, and the only thing I know about Leica is that I can't afford them. So what lenses should I be looking at, between 70-135mm (native full-frame) that I can adapt, at under $200 or so? It's difficult to judge by eBay pricing what's good and what isn't. Ideally I would like fast sharp primes. I'm pretty happy with my Panasonic 45-200mm zoom. Greg.