Vidikron Vision 50 - Manual (Page 29)

Installation
Vidikron Vision 50 Series Owner’s Operating Manual 17
PRE
L
IMINAR
Y
Vertical and Horizontal
Position Proper placement of the projector relative to the screen will yield a rectangular,
perfectly-centered image that completely fills the screen.
Ideally, the projector should be positioned perpendicular to the screen and in such a way
that the lens center and screen center are aligned with each other, as shown in Figure 3-2.
Figure 3-2. Projector Placement
Vertical Lens Shift If it is not possible to align the projector and screen as shown in Figure 3-2, you can use the
lens shift (LENS) controls on the projector remote to center the image on the screen. Vertical
lens shift is generally expressed as a percentage of the screen height, as shown in Figure 3-3.
Figure 3-3. Vertical Lens Shift (Example Only)
Height
Projection Distance
Ceiling
Ceiling Installation
Screen Height
Floor
Lens Center
Projection Distance
Floor Installation
Lens Center
x
Lens Center
x
Screen Lens 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.