Changing the focal length of a camera by adjusting the physical zoom lens. All zoom lenses in film cameras and digital single lens reflex (DSLR) cameras are optical zoom. Digital point-and-shoot ...

The optical zoom ... camera uses, the one that comes with the camera is typically undersized. Plan on purchasing a larger one when you buy the camera (see flash memory). Digital cameras come with ...

This high-end camera phone sports a 5-megapixel camera with auto-focus and a true 3x optical zoom, plus EVDO Rev A data for speedy uploads. Other features include a water-resistant clamshell body ...