Digital Video: A variable focal-length lens, used to magnify the target image. The most common zoom lens on digital cameras has a 3:1 ratio. The zoom function on digital cameras will be either an optical zoom or a digital zoom.
A lens having internal movable elements that allow the focal length to be changed without changing the image plane.
A lens with a variable focal length - usually which can be moved from a wideangle setting to a telephoto one - found on cameras and projectors.
A lens of variable focal length which permits the cameraman to change from wide angle to telephoto shots (and vice versa) in one continuous movement.
A zoom lens has the advantage of offering a variable focal length to view both wide angle to telephoto scenes.
A lens that can adjust the size of the projected image without having to physically move the projector.
A lens with a variable focal length that ranges from wide angle to telephoto
a camera lens that magnifies the image
a camera lens with variable focal length
a compound lens with a variable effective focal length
a feature on higher-end projectors that allows adjustment of focal length
a lens of variable focal length that can be zoomed (changed) from one focal length to another focal length by rotating or pushing or pulling a lens barrel
a lens that can be changed in focal length continously without losing focus
a lens that can shift its focal length
a lens that can vary its focal length, which varies the angle of view as well as the magnification
a lens that covers a range of focal lengths as opposed to the single focal length of a prime lens
a lens with fixed object and image positions, but variable magnification
an assembly of lens elements that move the change the focal length from a wide angle to a telephoto while maintaining focus on the camera's imager
a type of telephoto lens in which the amount of magnification is variable
Lens that has variable focal lengths.
A lens consisting of variable focal lengths
A lens that delivers different focal lengths without creating a shift of focus regardless of the focal length setting.
A camera lens that can vary the focal length while keeping the object in focus, giving an impression of coming closer to or going away from an object. It is usually controlled by a keyboard with buttons that are marked zoom-in and zoom-out.
A lens with a variable focal length. You can adjust the size of the image on a screen by adjusting the zoom lens, rather than making the projector closer to or further from the screen.
A lens in which you adjust the focal length over a wide range. In effect, this gives you lenses of many focal lengths.
Zoom Lens: A lens that can change the size of the projected image without moving the projector. The focal length is variable.
A lens with a variable focal length. This translates to being able to adjust the size of the image on a screen by adjusting the zoom lens, instead of having to move the projector closer or further.
a single lens with a variable focal range.
A compound lens which remains in focus as the image size is varied continuously. May be motorized or manually operated.
A lens with variable focal lengths.
A lens that offers a continuous range of focal lengths, especially from wide-angle to telephoto. While larger, heavier, and slower than comparable single focal-length lenses, zooms offer convenience and increasingly good quality, and have gained a large following among photographers.
A lens with a variable focal length. Rather than moving the projector closer or further from the screen, the size of the image on the screen can be changed by adjusting the zoom lens.
A lens with the ability to change its focal length manually or through the use of a controller to cover a variety of needs.
A lens system that may be effectively used as a wide angle, standard, or telephoto lens by varying the focal length of the lens.
A lens of adjustable focal length. You can zoom to increase or decrease the lens' magnifying power, making the subject bigger or smaller in the frame.
A zoom lens is a mechanical assembly of lens elements with the ability to vary its focal length, as opposed to a prime lens which has a fixed focal length. They are commonly used with still, video, and motion picture cameras, some binoculars, microscopes and telescopes, and other optical instruments.