Runco VX-2i manual Vertical and Horizontal, Position, Lens Shift

Installation

Proper placement of the projector relative to the screen will yield a rectangular,	Vertical and Horizontal
perfectly-centered image that completely fills the screen.	Position
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 3-3.

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 3-3. Projector Placement
If it is not possible to align the projector and screen as shown in Figure 3-3,you can use			Vertical and Horizontal
the lens shift controls to center the image on the screen. Lens shift is generally expressed			Lens Shift
as a percentage of the screen height or width, as shown in Figure 3-4and Figure 3-5.

Vertical Lens Shift: The VX-2i provides up to 80% of downward vertical lens shift. For example, with a 96 x 54-inch (16:9) screen, you can shift the image up to 43.20 inches (1.10 meters) below the screen center. (Upward vertical lens shift is not possible.)

Horizontal Lens Shift: The VX-2i zoom lenses (Proteus B through F) allow up to 10% of horizontal lens shift in either direction (left or right). For example, with a 96 x 54-inch (16:9) screen, you can shift the image up to 9.60 inches (24.38 cm) left or right of the screen center. (Horizontal lens shift is not possible with the Proteus A lens.)

Note	1. With no vertical or horizontal lens shift, the lens center and
	screen center are aligned with each other.

2.Vertical shift limits are percentages of the screen height. Horizontal shift limits are percentages of the screen width.

3.Vertical lens shift figures apply to ceiling mount configurations. For floor installations (where the projector is upright), reverse the up/down vertical offset percentages.

Runco VX-2i Owner’s Operating Manual 17