Broadcast lens

Broadcast lens in television industry are lenses used for broadcasting in television studio or on the location/field. Main manufacturers of broadcast lenses are Canon and Fujifilm's Fujinon brand. Broadcast lenses can be box-shaped, which are heavier and for use in limited range or classically shaped, lighter and for portable use.

Types
Lens are generally classified into three types:
 * Studio zoom lenses, used mainly in the television broadcasting studio.
 * Field zoom lenses, used for relay broadcasting of sports and other type of live events.
 * Electronic news-gathering/Electronic field production (ENG/EFP) lenses, used for production of news and on-location events.

Features
Typically broadcast lenses have:
 * Less focus breathing
 * Variable focal lengths (18–35 mm)
 * Zoom which maintains focus as the focal length changes (parfocal lens)
 * Aspherical lens with fast and large lens aperture
 * Servomotor control of zoom, focus and aperture via remote control handles
 * Built-in image stabilization
 * Multi-group zoom lens system