Originally posted by Deni Canons are 1.6x factor
Well, for the current DSLRs that are built like 35mm film cameras, I know of the following crop factors:
Canon 1 DS MkIII and 5D and Nikon D3 are "full frame" (same as the 24x36mm 35mm film frame)
Canon 1D MkIII and Leica M8 are a 1.3X factor (multiply by 1.3 to have the equivalent field of view of full frame)
All Pentax DSLRs, Sony, Fuji and all Nikon other than the D3: 1.53X factor
All Canon other than 5D and 1 D series: 1.6X factor
Sigma SD14: 1.7X factor
All "4/3" system (Olympus, Panasonic, and Leica branded): 2X factor
I also think the old Kodak DSLRs with the Nikon F-Mount were 1.3X, but I'm not sure. And there may be others that I've forgotten.
And there are also a number crop backs for various medium format cameras.