Runco LS-HB Ceiling Installation, Floor Installation, 3. Projector Placement, Lens Shift

Installation

Ceiling Installation

Height

x

Lens Center

Ceiling

Projection Distance

Lens Center

Screen

Floor Installation

Height

Lens Center

x

Screen

Lens Center

Projection Distance

Floor

Figure 3-3. Projector Placement

You can use the lens shift controls on the projector to center the image on the screen.	Lens Shift
Lens shift is generally expressed as a percentage of the screen height or width, as shown
in Figure 3-4.

Screen Center

0%

50% Height

Lens Shift

(0.5 x H)

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)

Vertical Lens Shift: The LS-HB 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.

Runco LS-HB Installation/Operation Manual 19