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4:3 and 640 x 480 Projectors

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Contrast Ratio
Contrast Ratio

This is the ratio between the whitest white and the blackest black. Two types of measurements of contrast ratio are: 1) ANSI (American National Standards Institute) contrast- measured by projecting 16 alternation white and black rectangles; 2) Full On/Off contrast: measurement of light out when a projector shows an all white image compared to the amount of light output of a comppletely black image.

Aspect Ratio
Aspect Ratio

The standard ratio of a display screen is 4:3 (width to height).

  • 4:3 (1)

Display Type

Native Resolution
Native Resolution

Measured as width and height, the number of pixels that make an image is it's resolution. The more pixels the higher the resolution.

Brightness
Brightness

Measured in Lumens, the further away your computer is set up and the more light present in a room, the brighter the lamp you'll need. For example, larger venues typically require 2000 Lumens.

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Optoma EP721 DLP Projector

Optoma EP721 DLP Projector
3 Reviews

Desktop, DLP, 4:3, 2200 lm, 2000:1, 640 x 480, PC, 30 dB more

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  • from $460.00
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    Review
    Selected reviews for:

    Optoma EP721 DLP Projector
    • From:Amazon
    • Posted:Nov-10-2008
    • Great Projector!
    • I bought this projector based upon the reviews posted, and was not disappointed. I have used it in several key meetings and have not had any trouble at all. The projector is easy to use. I would...
    • read full review | report as inappropriate
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