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Term - Z

Zoom Lens :

A lens which has variable focal lengths. The image can be 'zoomed' in or out whilst the view of the camera remains in focus.

Zoom Ratio :

The ratio of the starting focal length (wide position) to the ending focal length (telephoto position) of a zoom lens. A lens with a 10X zoom ratio will magnify the image at the wide angle end by 10 times.

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