'Camera zoom lens' presentation slideshows

what is a camera zoom lens definitons ?

A zoom lens is a mechanical assembly of lens elements for which the focal length can be varied, as opposed to a fixed focal length lens . A true zoom lens, also called a parfocal lens, is one that maintains focus when its focal length changes. Zoom lens definition: A zoom lens is a lens that you can attach to a camera, which allows you to make the... Meaning, pronunciation, translations and examples.

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