I have used the Mamiya 6MF with the pano adapter and 50mm lens. It is OK, but the Xpan will be a better camera. The pano adapter is a real compromise particularly in the viewfinder frame lines. If you occasionally shoot panos or want to be able to run 35mm film in your 6 when you run out of 120 film, the pano adapter is good to have. If you want to do panoramic photography, the Xpan will be better. I used a Widelux or Horseman SW 612 for my pano work. I love my Mamiya 6s, but not for pano photography.