Many tidal moons ago, when Cambo first came out with the combination of DSLR body onto Cambo + SLR/MF/LF lenses interface lens plate, I find my D2x sensor ratio to wide angle (ie interior shots) near impossible. At that stage in time, my widest lens available to me was HR28 and Hasselblad 40mm IF. Neither of them were wide enough for interior/arch. Products and any long focal application (as per above replies) great. When the first Cambo RS came out, I jumped upon that (or Alpa and others of the like) and never looked back. Hope the information helps.