The PowerShot SD990 IS Digital ELPH has 3.7x optical zoom. A zoom opens up a world of possibilities in your photography, and thanks to innovative Canon engineering, it's housed in a camera that's sized to go everywhere with you. With many cameras, hand-held shots taken at the long end of the zoom can be marred by blur. The SD990 IS Digital ELPH incorporates Canon's exclusive Optical Image Stabilizer. The technology detects and effectively cancels camera shake, for clear, sharp images every time.