I had a C330 and found that the 55mm was solid, the 80mm ok, the 105mm silver in particular to be fantastic, and the 180mm and 250mm mediocre at best. They seem to have less contrast and are plenty sharp, but definitely not a Rolleiflex or a Mamiya 7 quality. I now have a Yashica LM that, by my enlargements, is roughly the same. I doubt I could tell the difference.