4.To return to optical zoom, press 
until digital zooming stops. Release 
, then press it again.
NOTE: Digital zoom reduces the resolution of an image, so your picture may be more grainy than the same image taken with optical zoom. When you need higher quality, limit the use of digital zoom.
NOTE: Digital zoom is not available while recording video clips, in the Panorama modes, nor in the Super Macro focus setting.
Zoom and Focus
The more you zoom in on the subject of your picture, the more small movements of the camera are magnified (this is called camera shake). If 
appears when you press the Shutter button halfway down, you are moving the camera or the scene needs more light; the picture will likely be blurry. Try holding the camera closer to your body or against a steady object, or set the camera on a tripod or stable surface. Also try turning on the flash or turning on lights to add more light to the scene.
TIP: Increasing ISO Speed (see page 76) can help reduce camera shake, but can result in increased noise in your images.
Also, when the camera is in Normal, Manual, or Infinity focus range settings, the zoom indicator has a notch. When the green marker is to the right of the notch, be sure that your subject is within the Normal focus range (see page 42); otherwise the picture will likely be blurry.