 The Sony Alpha a550 incorporates Sony's patented SteadyShot INSIDE stabilization system which works with any attached lens.This uses a CCD-Shift system which moves the entire sensor platform in two axes.Sony claims the system is good for between 2.5 and 4 stops of compensation depending on the lens and shooting conditions, and like the entry-level Alphas it’s enabled or disabled from a menu option rather than with the physical switch of earlier models.