Runco Reflection RS-440, User Manual

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Installation
Runco RS-440 Installation/Operation Manual 17
PRE
L
IMINAR
Y
Vertical and Horizontal
Lens Shift If it is not possible to align the projector and screen as shown in Figure 3-3, you can use
the lens shift controls 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 Len s S hift (Example only)
Base plate
to lens center =
approx. 4" (depending
on the amount of lens shift)
50% Height
Lens Shift
(0.5 x H)
100% Height
Lens Shift
(1.0 x H)
150% Height
Lens Shift
(1.5 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 shown in this example.