I am often asked which Phase One digital back models are compatible with a specific camera mount. For example, the other day I was asked; “Which is the last model Phase One built with the 60MP sensor that fits my Contax camera?” The answer is IQ260, Phase One dropped the Contax mount when they announced the IQ3 line of digital backs. Check out page 2 through 5 of this handy little serial number prefix reference chart where the compatibility is listed. You may also be surprised to see the full breadth of Phase One products over the past 30 years!