In late Minolta announced details of their 7D DSLR, which instead of depending on image stabilized lenses, had an image stabilization system built into the body of the camera. have to admit that right if was typical amateur photographer with little expectation of owning Image Stabilized super telephoto lenses, Id be sorely tempted to try out the 1300 Pentax K20D with 14. 2MP sensor, ISO and body based image stabilization using sensorshift. This would be closed loop system and as such could adapt to the stabilization provided by the lens IS.

This wouldnt be so great if it added 1000 to the of each lens. In addition, very small displacement of an optical element can result in large image shift, so large amplitude shifts can more easily be corrected. Whether its possible to do predictive stabilization dont know. For lenses like the EF702002. 8L the addition of IS increases the by about 450.

If you could tell how stable the image was and that information could then be used to move the sensor to compensate. It cant directly look at the image because the image isnt normally formed on the sensor of DLSR until the shutter is opened though in Live View mode it is.Similarly normal sensorshift based stabilization uses gyros in the camera body to provide the signal for similar open loop system. Whether its possible to do predictive stabilization dont know. My experience with both systems suggest that the performance differences, at least with wideangle to short telephoto lenses, are small.

have to admit that right if was typical amateur photographer with little expectation of owning Image Stabilized super telephoto lenses, Id be sorely tempted to try out the 1300 Pentax K20D with 14. 2MP sensor, ISO and body based image stabilization using sensorshift. That means you need lot more force and energy to move it around rapidly. This wouldnt be so great if it added 1000 to the of each lens. While Canon and Nikon are the current leaders in the consumerprosumer DSLR market, Sony and Pentax are catching up and producing some pretty competitive cameras.

This be more of an issue with long telephoto lenses than wideangle lenses, since the image shift for given amount of camera movement is proportional to the focal length of the lens in use and how steady your hands are. If CanonNikon dont offer sensorshift, at least in their APSC sensor bodies, suspect they will lose sales. Those factors outweigh performance and ergonomics for users. Is this practical? think so, though it requires some innovative engineering to do it. The image from the lens stabilized or not is always projected onto the autofocus sensors via submirror.
Tags: Canon, Image Stabilization, Minolta, Nikon, Pentax