Digital Image Stabilization mode is more effective than Optical Image Stabilization in three key respects:

• Capturing subjects in motion: Digital Image Stabilization’s high ISO sensitivity combined with a fast shutter speed minimizes blur caused by camera movement (shaky hands) and subject movement. Optical Image Stabilization is incapable of compensating for a moving subject.
• Taking pictures in low light: Digital Image Stabilization’s high ISO sensitivity enables the camera to take brighter pictures in dim light; the same picture taken with Optical Image Stabilization alone will be darker.
• Consuming less power: Digital Image Stabilization does not require any additional power; Optical Image Stabilization drains batteries more quickly.