This is a medium format camera that shoots 6x7 images, which isn't all that uncommon, but it was built like a traditonal SLR. So, rather than having interchangeable backs like the Mamiya 67 format cameras, you actually had to open the back and load the film like you would a 35mm camera. You had to do it fairly often, too, because with images that big, a single roll of 120 will only get you 10 photos.