On Jul 15, 2005, at 12:23 PM, Pål Jensen wrote:
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!
Theoretically, sure. However, improved optical quality means nothing
if the image is blurred from camera motion. It's a compromise, like
all things.
That said, I'll laugh if you tell me that Canon's 70-200/2.8L IS or
300/4L IS are poor performing lenses.
Godfrey
