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Video magnifiers are electronic devices that use a camera and a display screen to perform digital magnification of printed materials. The display screen is usually LCD or a similar flat-screen technology (although older video magnifiers have used CRT displays), and the device usually includes a lamp to illuminate the source material.
A dome magnifier is a dome-shaped magnifying device made of glass or acrylic plastic, used to enlarge words on a page or computer screen. They are plano-convex lenses : the flat (planar) surface is placed on the object to be magnified, and the convex (dome) surface provides the enlargement.
A magnifier is a device used for magnification. Magnifier can also refer to: Magnifying glass, an optical device for magnification; Screen magnifier, software that magnifies part of a computer screen Magnifier (Windows), a screen magnifier for Microsoft Windows; Magnifier (iOS), a magnifying glass app for iOS; Magnifier, a magnifying glass app ...
A screen magnifier is software that interfaces with a computer's graphical output to present enlarged screen content. By enlarging part (or all) of a screen, people with visual impairments can better see words and images.
A jib can be used for getting high or low shots which are difficult for a hand-held camera operator to get, or shots which need to move a short distance horizontally or vertically, without the expense and safety issues of putting a camera operator on a crane for a crane shot or laying track for a camera dolly. A jib can even be mounted on a ...
On modern cameras using auto exposure the decrease in exposure is corrected for by the camera, but when not using auto exposure this has to be calculated and taken into account when setting exposure. The exposure compensation, called the bellows factor , is a dimensionless ratio that is applied to the relative aperture ( f-number ), resulting ...
Magnifiers are typically characterized using a "standard" value of 0.25 m. A magnifying glass operates as the simplest form of optical instrument. It is essentially a hand-held lens that converges light to produce an enlarged, upright image that appears to stand where light doesn't actually converge, known as a 'virtual' image.
The postage stamp appears larger with the use of a magnifying glass. Stepwise magnification by 6% per frame into a 39-megapixel image. In the final frame, at about 170x, an image of a bystander is seen reflected in the man's cornea.
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