Godfrey > 1: In-body IS is generally not as effective as in-lens IS. The value > of IB-IS is that it can apply to all lenses.
..and it won't reduce optical quality... Regardless of how good the Canon IS lenses are, they would have been better without the IS feature. Optical IS almost doubles the number of lens elements and introduce various abberations that needs correcting. All this from the Pentax IS Patents from about 1990! Pål
