Out of curiosity, has anyone used the Zeiss or Yashica lenses for Contax/Yashica mount? I've read many m43 forums around the web and it seems to be the one lineup of lenses that I've seen and read the least about. There seems to be many of them available used, especially on eBay, and the price for many doesn't seem too extravagant. How would they fit on a camera like the GF-1? There were a few adapted lenses I was looking until I saw the Matching Simulation on the four-thirds.org website and realized that the lens and adapter combinations really no longer made the GF-1 a small, compact camera.