"Canon's press material for the EOS 5D states that it 'defines (a) new D-SLR category', while we're not typically too concerned with marketing talk this particular statement is clearly pretty accurate. The EOS 5D is unlike any previous digital SLR in that it combines a full-frame (35 mm sized) high resolution sensor (12.8 megapixels) with a relatively compact body. The EOS 5D is aimed to slot in between the EOS 20D and the EOS-1D professional digital SLR's, an important difference when compared to the later is that the EOS 5D doesn't have any environmental seals. While Canon don't specifically refer to the EOS 5D as a 'professional' digital SLR it will have obvious appeal to professionals who want a high quality digital SLR in a body lighter than the EOS-1D."A typically good hands-on preview of the newly announced Canon EOS 5D. Read on to find out more. I really wish I have about $4K lying around to waste (invest) in this. One unfortunate point is that apparently the lenses that work with the EOS 10D/20D and the 350XT etc don't work with the 5D. Bad idea IMHO.