The MEGA O.I.S. (Optical Image Stabilizer) compensates for the blurring caused by hand-shake. Apart from the digital image correction, the MEGA O.I.S. corrects a jolt of light axis by shifting the O.I.S. lens unit to offset it. Thus the image is not affected digitally nor deteriorated at all. You get clear, sharp images in exchange for nothing. The MEGA O.I.S. lets you shoot in dimly lit rooms or evening illumination to preserve the mood, and works for macro shots and zoom shots, which are especially susceptible to hand-shake.