I am taking my Mamiya 7 with me to India in 10 days, and was planning to use 220 film (because it is more compact to carry, and because I don't want to have to change rolls so often.) In looking at the Mamiya 7 user form, I noticed a posting from a professional photographer from France whose experience was that pictures taken with 220 film in the Mamiya 7 were significantly less sharp than those taken with 120 film. In anticipation of my trip, I tried some 220 during the summer, and did not notice any problems (That said, many of the pictures were dance pictures where I was deliberately trying to blur and to show movement.) On the other hand, I also have used 35mm film with the panoramic adapter (and the pressure plate set for 220) and likewise did not notice any problems. However, in view of the posting, I'd like to hear what other people's experiences have been.