Optical Camera Photography Zoom Lens

A zoom lens is a system of camera lens elements for which the focal length can be varied, as opposed to a fixed-focal-length lens.

What is Zoom Lens

A true zoom lens or optical zoom lens is a type of parfocal lens, one that maintains focus when its focal length changes. Most consumer zoom lenses do not maintain perfect focus, but are
still nearly parfocal. Most camera phones that are advertised as having optical zoom actually use a few cameras of different but fixed focal length, combined with digital zoom to make a
hybrid system.

Pictures of Zoom Lens for Camera Photography 

People also ask

• What is a zoom lens used for?A zoom lens allows magnification of images and the ability to crop out unwanted subject matter. Visual resolution. If you’re able to spring for a top-notch zoom lens, you may find one with sharpness that’s highly comparable to a prime lens. Ability to change focal length on the go.Zoom lenses can cover any range of focal distance. A zoom lens is any lens that varies in its focal distance, such as 11-18mm, 24-70mm, or 24-240mm. Some zoom lenses cover more range than others, but any lens with a variable focal distance that you can change is considered a zoom lens.