I have had my 4x5 camera for a few months now and have shot quite a few pictures with it. I have always thought that I should be seeing more out of it though in terms of sharpness. I have some pictures of the same subjects I took with my medium format (mamiya) camera and they are significantly sharper. I focus my 4x5 carefully and check every area of the gg. But even when focusing on a specific single object the mamiya is sharper. I use tmax in both and develop both in the same developer. I print the medium format with a new Rodenstock lens and the 4x5 with a new Schneider comp s. I have used a readyload and the toyo film holder in the 4x5 with the same results. My lenses are a Nikon 90sw 5.6 and a new Rodenstock 180mm sironar s. Does any one have any thoughts? It seems to me it is probably a lens difference. Looking at a print from the medium format side by side with one from the 4x5... well, the 4x5 in really unacceptable.