Zoom Lens

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Zoom Lens

A lens that allows a photographer to focus so that it appears that a picture is closer to or farther away from the viewer. The first zoom lens was developed by Frank Back and was introduced in 1959.
References in periodicals archive ?
Never touch the tip of a lens care solutions bottle to any surface.
The relationship between corneal shape and soft contact lens fit
If you have a cataract removed, you can receive intraocular contacts, or contacts implanted in front of the lens, designed to correct presbyopia.
A long telephoto lens usually creates a softer background than a wide-angle lens does, depending on the distance from our subject and what we choose to focus on.
The combined target/moderator/reflector (TMR) assembly for LENS will be about 2 m in diameter.
Moisten a clean piece of lens tissue with water of glass cleaner.
Making the new type of lens is "a clever and imaginative step," comments John A.
Using a compact digital camera equipped with a 24mm wide-angle conversion lens, I shot from ground level, within a few feet of the woman at right, who is my anchor layer.
As the computer removes the overall blurring introduced by the ray-altering lens, it introduces a smattering of random errors, or noise, which may show up as subtle roughening of smooth surfaces.
Although there has been no documented case, it is possible, Fierson said, for the HIV virus to be transmitted through an unsterilized contact lens.
Varioptic has now established itself as a leader in liquid lens manufacturing thanks to working very closely with our partner CSI.
The selenium in one coated lens is about 1 percent the amount in a typical U.