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Electric screens can be wall-mounted, ceiling-mounted or ceiling recessed. These are often larger screens, though electric screens are available for home theater use as well. Electric screens are similar to pull-down screens, but instead of the screen being pulled down manually, an electric motor raises and lowers the screen.
A Zenith 1200 CRT Projector based home theater. Visible extending from the ceiling are three lenses, one each for red, green and blue Black and white CRT projector. A CRT projector is a video projector that uses a small, high-brightness cathode-ray tube (CRT) as the image generating element. The image is then focused and enlarged onto a screen ...
Kodascope is a name created by Eastman Kodak Company for the projector it placed on the market in 1923 as part of the first 16mm motion picture equipment. The original Kodascope was part of an outfit that included the Cine-Kodak camera, tripod, Kodascope projector, projection screen, and film splicer, all of which sold together for $335. [1]
Featuring a touch-sensitive screen and a full QWERTY keyboard, well-preserved units can sell for several hundred dollars (around $250), while rare editions like the Revo 8MB can command even ...
So if the screen is 60" wide, the projector needs to be 120" from the screen. A video projector (lens) with a throw ratio of 0.4 or less would be positioned relatively close to the screen, and would be considered a "short throw projector". [3] A video projector that must be positioned very far from the screen would need a "long throw lens" with ...
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