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A zoom lens is a system of camera lens elements for which the focal length (and thus angle of view) can be varied, as opposed to a fixed-focal-length (FFL) lens . A true zoom lens or optical zoom lens is a type of parfocal lens, one that maintains focus when its focal length changes. [1]
This is a list of smartphones with a telephoto lens that offers a focal length (35mm equivalent) of at least 100mm or "4× optical zoom" with an imaging area equivalent to a 1/3.5″ or larger sensor. Smartphone lenses are often marketed in terms of "optical zoom" [1] relative to the phone's main camera. For example, 120mm is usually referred ...
Hybrid zoom is a concept used in smartphones that takes advantage of optical zoom, digital zoom, and software to get improved results when zooming in further than the lens' physical capabilities. [5] Smartphones with optical zoom have lenses with 3× or 5× magnification.
A zoom lens allows for changing its focal length within a certain range, providing the convenience of adjusting the scene capture without moving the camera or changing the lens. A prime lens, in contrast, has a fixed focal length. While less flexible, prime lenses often provide superior image quality, are typically lighter, and perform better ...
As an example, one modern lens (Canon EF 400 mm f /4 DO IS) achieves a telephoto ratio of 0.58 in part due to a front (converging) lens group which incorporates diffractive optics. Diagram of a typical telephoto lens with a large positive lens and a smaller negative telephoto group combined to create a much longer focal length - f.
The best lenses for iPhone and Android phones will elevate your photos and vidos giving them a more professional feel The best lenses for iPhone and Android phones in 2022: add-on phone lenses ...
There is no precise definition of the term, but lenses marketed as "standard zoom" usually cover a range of at least 30mm to 70mm in terms of 35mm equivalent focal length with an optical zoom ratio of 2.5× (e.g. 28-70mm) to 5× (e.g. 24-120mm) — the most common being 3× (e.g. 24-70mm). [1]
There is no space for an optical zoom lens, with the exception of hybrid camera smartphones such as the Samsung Galaxy K Zoom and S4 Zoom. Some smartphones are equipped with additional lenses to simulate optical zooming. Controls work by a touchscreen menu system. The photographer must look at the menu instead of looking at the target.
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