
Installation
| Ambient Light ➤ | In general, minimize or eliminate light sources directed at the screen. Contrast ratio in your | 
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 | images will be noticeably reduced if light directly strikes the screen, such as when a shaft | 
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 | of light from a window or floodlight falls on the image. Images may then appear washed | 
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 | out and less vibrant. | 
| Throw Distance ➤ | Throw distance is the distance measured from the front of the projector to the screen. | 
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 | This is an important calculation in any projector installation as it determines whether or not | 
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 | you have enough room to install your projector with a desired screen size and if your | 
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 | image will be the right size for your screen. | 
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 | You can quickly estimate the throw distance by taking the width of the screen and | 
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 | multiplying it by the lens throw ratio; see Figure  | 
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 | roughly how far back the projector should be positioned from the screen in order to | 
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 | project a focused image large enough to fill the screen. | 
Estimating Throw Distance
Throw Distance (TD) = Screen Width (w) x Lens Throw Ratio
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| creen | width | 
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 | (w) | |
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TD
Figure 3-1.  Estimating Throw Distance
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