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Runco LS-3/LS-5 Installation/Operation Manual 19
PRE
L
IMINAR
Y
Lens ShiftYou can use the lens shift controls on the projector to center the image on the screen.
Lens shift is generally expressed as a percentage of the screen height or width, as shown
in
Figure 3-4 and Figure 3-5.
Figure 3-4. Vertical Lens Shift (Example Only)
Vertical Lens Shift: The LS-3/LS-5 provides up to 25% of upward vertical lens
shift and up to 60% of downward vertical lens shift. For example, with a 100 x 56
inch (1.78:1) screen, you can shift the image up to 14.00 inches (0.36
meters) above or
33.60 inches (0.85
meters) below the screen center.
Horizontal Lens Shift (LS-5 Only): The LS-5 provides up to 7.5% of horizontal lens
shift left or right. For example, with a 100 x 56 inch (1.78:1) screen, you can shift the
image up to 7.50 inches (0.19
meters) left or right of the screen center.
50% Height
Lens Shift
(0.5 x H)
100% Height
Lens Shift
(1.0 x H)
Screen Center
0%
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.