Runco Q-750D Ceiling Installation, Floor Installation, 2.Projector Placement, and Figure

Installation

Vertical and Horizontal	➤	Proper placement of the projector relative to the screen will yield a rectangular,
Position		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

	Ceiling
Height	Projection Distance
x

Lens Center

Lens Center

Screen

Floor Installation

Height

Lens Center

x

Screen

Lens Center

Projection Distance

Floor

		Figure 3-2. Projector Placement
Vertical and Horizontal	➤	You can use the lens shift controls to center the image on the screen. Lens shift is
Lens Shift		generally expressed as a percentage of the screen height or width, as shown in Figure 3-3
		and Figure 3-4.

Screen Center

0%

50% Height

Lens Shift

(0.5 x H)

Base plate

to lens center =

approx. 5-6" (depending

on the amount of lens shift)

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 3-3. Vertical Lens Shift (EXAMPLE ONLY)

18 Q-750d Series Installation/Operation Manual