the amount that it has to be moved depends on the amount of image movement, which is a function of focal length. a lens mounted IS system doesn't have as much dependency on that if you can position the moving group near the lens' tripod mount. there are pluses and minuses to both approaches. body IS isn't a complete win with no disadvantages. you have to go lens IS if you want to use it on a film camera, and that is why Nikon and Canon have it in their lenses and not in their bodies.
Herb... ----- Original Message ----- From: "J. C. O'Connell" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, October 14, 2004 8:21 AM Subject: RE: Minolta Maxxum wth BODY IS > the motor size is going to depend on motor > power and the motor power required is going to > depend not simply on the amount of movement > but rather the acceleration of the moving masses > involved..

