Partial theory and a small test by somebody on POTN. I'll see if I can find the thread..Originally Posted by Photo-John
*I've looked since I've originally posted this thread and I can't find what I was looking for. If anybody has seen the post and can find the link, please post it. It had about 3 photos comparing a Sony A700 w/ 18-70mm f/3.5-5.6(D) and a Canon 30D w/ 24-105mm F/4L IS lens, both at 50mm. I did find this wikipedia link which does show some pros and cons about built in IS vs in lens.
http://en.wikipedia.org/wiki/Image_s...e_image_sensor