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Our online glossary is here to help you make sense of the terminology used in the cell phone industry. It covers mobile technologies, such as 3G and 4G, and even includes a bit of information on smartphone operating systems and the companies that make the cell phones and other mobile technology devices we all use.

What is "optical zoom"?

Optical zoom refers to a lens that can change its focal length in order to vary its view from wide angle to telephoto. Such lens systems are generally somewhat large, and require a great deal of physical 3D space on a mobile device to implement. Optical zoom provides vastly superior images when compared with digital zoom systems that use software to provide a telephoto effect in a camera.

See Also: telephoto, focal length, wide angle, digital zoom

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