Originally posted by photoptimist 1) Duration of stabilization:
The K-1's SR system sensors only needs to be accurate for 1 shutter speed time.
The K-1ii's SR+PS system sensors needs to be sufficiently accurate for period of 4 shutter speed times plus about 3/4 second of sensor data read-out.
2) Accuracy: Also, SR+PS is a lot less forgiving of error than plain single-shot SR.
During single-shot SR, uncorrected shifts of up to a pixel merely create slight blurring of the image. A serious pixel peeper might be disappointed but the image is not ruined.
But for PS, uncorrected errors of even half a pixel on any of the four shots creates very obnoxious checkerboard color artifacts on all the edges in the scene.
Besides the fact that it is just a rumor... the Dynamic PS, if it is not using the SR system for SR, but instead for PS, would just have to detect the amount of movement of the camera, not correct for it, if it can accurately tell how much the image "moved" on the sensor for each shot. The advancement in the SR II for pixel shift might not be that it has 8x precise sensor movement, but that it would be able to tell how much movement occurred, so it would know how to line the frames up.