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 ?
Always carry your contact lens case along with a bottle of multi-purpose solutions to have a safe place to store your lenses
As a practitioner, soft contact lens fitting can sometimes feel very much like trial and error.
The most common method of contact lens correction for presbyopia is called "monovision," in which one lens is fitted for close-up vision and the other for distance vision.
In my third example (far right), I used a long telephoto lens to compress a rain-swept landscape just outside California's Sonora Pass, and thereby to change its appearance and meaning by rearranging my subjects in space.
The primary LENS moderator will be a (12 X 12) [cm.
The technology aims to prevent eye infections to the benefit of the world's 100 million contact lens wearers.
If you're in sandy, dusty areas, keep the lens covers on and the binoculars in your pocket and out of the elements.
This produces a rounded lens with a small focal length, so the drop can focus light only to a point near itself.
Our second example, which I photographed in Bagan, Myanmar (above left), illustrates how a wide-angle lens can fit large subjects into a picture, even in tight spaces.
When light bounces off an object and passes through the lens of a camera, it is recorded on film or a computer chip as an image.
Cathey and Dowski began by imagining any scene observed through a lens as a mosaic of tiny points of illumination.
By fitting the lens to the shape of an eye, so the lens and eye move together, an eye doctor ensures that the cornea will receive proper oxygen and lubrication from tears.