optical zoom

(redirected from optical zoom range)

optical zoom

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 cameras as well as consumer and prosumer video camcorders have optical zoom, but they also have digital zoom.

Digital Is Software Zoom
At the telephoto side of the camera, the computer takes over and interpolates the results. For example, a still camera may have 3x optical zoom in the lens, but can process the image with its internal computer to 10x. Depending on the camera and subject matter, the software-created digital zoom can be quite acceptable or mediocre.

The Higher the Optical, the Better
The higher the optical zoom, the better the results. In a still camera, an optical zoom of 10x or more is called a "superzoom" lens. Note that if a still camera is advertised with "10x zoom," that does not necessarily mean optical zoom only. In many cases, the optical is 3x with the additional 7x being digital.

With camcorders, the optical zoom typically ranges from 10x to 64x, while the digital zoom can go from 100x to 1000x. See digital camera.
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References in periodicals archive ?
It offers a 4K L-series quality lens which has a 15x optical zoom range, a maximum aperture of f/2.8, a wide angle of 25.5mm and effective IS to ensure maximum control for stable 4K UHD footage.
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Sony Middle East and Africa has unveiled the new Cyber-shot H400 with a 63x optical zoom range.
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for optimum performance throughout the 50x optical zoom range. A newly designed
Turning the turret allows the operator to access each objective lens and an optical zoom range of over 70x the minimum magnification.
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Bosch Security Systems of Fairport, New York, has extended the optical zoom range of its AutoDome cameras to 26X magnification.
Sony Middle East and Africa unveiled the new CyberA[degrees]shot H400 with a 63x optical zoom range, the highest ever in a compact digital camera, last week.