
Installation
| Vertical and Horizontal | ➤ | Proper placement of the projector relative to the screen will yield a rectangular, | 
| Position | 
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 | Ideally, the projector should be positioned perpendicular to the screen and in such a way | 
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 | centered horizontally. See Figure  | 
Ceiling Installation
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| Height | Projection Distance | 
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| x | 
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Lens Center
Lens Center
Screen
Floor Installation
Height
| Lens Center | 
| x | 
Screen
Lens Center
Projection Distance
Floor
| 
 | Figure  | ||||||||||||||
| Vertical and Horizontal ➤ | If it is not possible to align the projector and screen as shown in Figure  | ||||||||||||||
| Lens Shift | the lens shift controls to center the image on the screen. Lens shift is generally expressed | ||||||||||||||
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Base plate
to lens center =
approx. 
on the amount of lens shift)
100% Height
Lens Shift
(1.0 x H)
Note: This is a general example of lens shift. Lenses vary in their shift capabilities. No particular
lens or projector is used in this example.
Figure 3-4.  Vertical Lens Shift (Example Only)
| 22 | Runco  | 
