EF-S lenses can't be used on full-frame Canon cameras, nor on their models with 1.3x crop factors, like the EOS-1D Mark III ... this part of the review, but because the 1Ds Mark III accepts ...

Visit our Comparometer(tm) to compare images from the Canon EOS-1Ds Mark III with those from ... of the target we don't generally use in our reviews. (We'll continue shooting the full res chart ...