If you want zoom power, Only Optical Zoom Matters
Optical zoom uses the optics (lens) of the camera to bring the subject closer – 3x optical zoon was quite common on Digital Camera’s but today we often see 10x or 12x zoom – The higher the Optical Zoom, the better.
Digital zoom is strictly an invention (and in my opinion hype) of digital video cameras. It is not uncommon to see digital videocams with 300x digital zoom – so when a digital camera is advertised with 3x digital zoom, no big deal. You can achieve the same 3x (and in fact as much as you want) digital zoom effect in an image editing software, such as Picasa or Photoshop. It is much more advantageous to do your “cropping/editing” later, so that you can then decide exactly which portion to crop and how much to enlarge (3x, 4x, …). If you do it in camera, image quality is irreversibly lost and you use valuable battery power.
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