(Not be confused with Fixed focus lens!) A lens that only has one focal length (as opposed to a zoom lens). A fixed focal length lens (also called prime lens ) will often have good brightness, contrast, and be optically well-corrected. For that, it doesn t need any special glass or aspheric lens elements. Fixed focal length lenses are always superior to zoom lenses if they re made with the same optical materials and standards. They usually offer a wider maximum aperture than zoom lenses. They re often preferable for indoor shooting, but are also favourite choices as long telephoto lenses used for wildlife, sports and news photography.ephotozine
Also known as a Prime lens. Fixed focal length describes a lens that has a focal length that is not adjustable; it s fixed. Such a lens cannot be zoomed.
Refers to a lens, the focus of which cannot be changed. Found in simple cameras, the focus is preset (or fixed) by the factory, usually at the hyperfocal distance, resulting in image sharpness for most common shooting conditions for snapshots.
Aperture remains constant regardless of the lens’ focal length. I.e. The Canon “L” series have a constant fixed aperture when zooming.
A type of lossy media compression that uses the same data per second throughout the entire audio/video file. The file size will be smaller than one with a variable bit rate. Because of the smaller size obtainable with a fixed bit rate, it is better for uses of streaming content over the internet.
Basically a non zoom lens. 100mm, 50mm, 200mm etc.