Vertical And Horizontal Position; Vertical And Horizontal Lens Shift; Vertical Lens Shift (Example Only) - Runco D-73d Ultra Installation & Operation Manual

Installation
Vertical and Horizontal
Position
Vertical and Horizontal
Lens Shift
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 is aligned with either the top or bottom edge of the screen area,
and centered horizontally. See Figure 3-2.
Ceiling Installation
Height
x
Lens Center
Floor Installation
Height
Lens Center
x
Figure 3-2. Projector Placement
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
3-3 and Figure 3-4.
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 3-3. Vertical Lens Shift (EXAMPLE ONLY)
Ceiling
Projection Distance
Lens Center
Screen
Screen
Lens Center
Projection Distance
Floor
26 D-73d Series Installation/Operation Manual
Screen Center
0%
50% Height
Lens Shift
(0.5 x H)
100% Height
Lens Shift
(1.0 x H)