I'm living in a small island , Naxos Greece. I just took the Canon 5D dslr. Before i use 350D. But the old lenses change the way they look , in the 5D camera. I test a friends 30D lens Sigma 17-70 but in my camera i see black edges. Most of the lenses working with smallest CCD sensors. I want to have the maximum wide ( without distortion like fisheye images) , and working with my camera. Can anybody help me ?