When shooting very large image circle lenses, like the Fuji 600 C, image circle = 620mm, on a very small format, 6x7 roll film back, what is the consequences of having 80% of the image circle not being absorbed on the film. Some people say the remaining light just gets absorbed by the inside of the bellows.. however, I am sure that not not 100% of the light is being absorbed, so the remaining li ght must go somewhere? Any one have experience at seeing the actual effects of this before and after... i.e. not blocking out most of the excess light with a lens hood? Does it lower contrast? Does it cause slight overexposures? Any in put would be helpful...