All 35 mm cameras are 3:2 format. The 1Ds Mark III, as the 1D mark III, as the 1Ds Mark II, as the 1D Mark IIn, as the 1D mark II, as the 1Ds, as the 1D, as the 40D, as the 30D, as the 20D, as the 10D, as the D60, as the D30 as the 400D, as the 350D, as the 300D... are all 3:2.
That's to say nothing of 35 mm film cameras