This question was inspired in part by the current thread on 5x7 film availibility. I shoot 4x5, 5x7 and 8x10, on two cameras: a 4x5 Wisner and an 8x10 Ansco with 5x7 back. I have often wondered if one camera could accomodate all three, e.g., an 8x10 camera with extra backs. The problem, it seems to me, would be with the bellows. My 4x5 Wisner has the longer bellows and when I want to use even a 90mm lens, I have to go to bag bellows. I can't imagine an 8x10 camera with a reasonably-sized bellows that would ever squeeze enough to accomodate even a modestly wide 4x5 lens, Is that the case, or is there some magic solution out there that will allow me to use just one camera for all three formats?