Well, if there was even a possibility of using my old FD 2.8 300 with the Olympus, I'd certainly look into it. First of all, there is the economic question. Were an adaptor available or able to be made, add that cost to the price of a used E-300, under $500, to get the albeit manual use of one of the great lenses ever designed. To get the new equivalent for my 20D would cost $5000. With on-camera review and histograms, I don't know what the problem would be with exposure and I doubt focussing would present much of a problem with that fast telephoto lens. Wide open, which is the way I've shot it about 85% of its life, the depth of focus is about 13 inches at reasonably close distances. It's pretty dramatic. Multiplication? No smaller-than-full-frame camera, like my 20D or the Nikon D2X, really multiplies the range of 35mm lenses, but they rather 'crop' the projected image. Results from the 1.6X of the 8MP 20D are acceptible to me and I imagine results from the only slightly smaller 8MP CCD of the E-300's 2x would be, as well. Can you imagine being able to shoot through only the 'heart' of a sensational lens - and effectively having an f/2.8 600mm! I'd sure like to try it. Dan:)