Hello, First off, for the uninitiated, I'm talking about Canon's original EF (FD lenses) camera, not the new line of Rebels, EOS, etc. http://en.wikipedia.org/wiki/Canon_EF_camera So, I just got one of these cameras and it's just beautiful. Perhaps the ultimate in Canon's FD line, and kind of a sleeper too. But one thing that mine is lacking is the split-image focusing screen. I learned after receiving mine that the later ones did have them, but mine doesn't. Also, the image lacks the brilliance of my AE-1 Program which has the super-duper Laser matte screen, same as the New F-1 (I believe). My question is, although the EF doesn't have user changeable screens, if I were to get a hold of one of 'said' interchangeable screens, could a competent repair tech put it in the EF? To have the EF w/ split image AND the much brighter laser matte screen would be a dream set up. Thanks to anyone who might have some insight on this issue. Happy holidays!