Runco VX-80d, VX-40d, VX-50d, VX-60d manual Vertical and Horizontal, Position

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 and screen center are aligned with each other, as shown in Figure 3-2.

Ceiling Installation

Ceiling

Height

Projection Distance

Lens Center

x

		Screen	Lens Center
	Floor Installation
	Height	Screen	Lens Center
	Lens Center
	x
		Projection Distance
			Floor
	Figure 3-2. Projector Placement
Vertical and Horizontal ➤	If it is not possible to align the projector and screen as shown in Figure 3-2,you can use
Lens Shift	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 3-3and Figure 3-4.
			Screen Center
			0%
			50% Height
			Lens Shift
			(0.5 x H)

Base plate

to lens center =

approx. 6-7" (depending

on the amount of lens shift)

100% Height

Lens Shift

(1.0 x H)

150% Height

Lens Shift

(1.5 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

22 Runco VX-40d/-50d/-60d/-80d Owner’s Operating Manual