coming out of the camera.
Reading Jan-March 2007 EOS Magazine issue, they explain Why Canon doesn't have any DSLR "in-body" sensor image stabilization camera:
"The obvious advantage of in-body stabilisation is that you don't need special lenses - it can be used with any lens. But ther are problems. In-body stabilisation is carried out by moving the digital sensor to compensate for camera movement. The aim is to keep the image steady in respect of sensor. This works quite well with short focal length lenses, says Canon. A 24 or 20 mm lens might only need the sensor to move 1 mm or so for moderate camera shake. However, longer focal lengths magnify the effect of camera shake. A 300mm lens would need the sensor to move about 5.5mm to achieve the correction. Canon gets with its in-lens image stabilisation at the same focal length. This degree of sensor movement is no possible with current technology, says Canon. Incidentally, in-body stabilistion is not visible in camera viewfinder because it only affects the sensor. However, Canon has not ruled out in-body stabilisation. At some point, in-body stabilisation may improve to the point at which such technology may be appropiate for certain segments of Canon's DSLR range.