Vidikron 90 manual Vertical Lens Shift

Installation

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

These are general examples of lens shift. Lenses vary in their shift

Note capabilities. No particular lenses were used in these examples.

150% Height

Lens Shift

(1.5 x H)

100% Height

Lens Shift

(1.0 x H)

50% Height

Screen Center Lens Shift

(0.5 x H)

0%

Base plate to center of lens Approx. 5-6" (depends on the amount of lens shift)

Figure 3-4. Vertical Lens Shift

150% Width Lens Shift

(1.5 x W)

100% Width Lens Shift

(1.0 x W)

Figure 3-5. Horizontal Lens Shift

50% Width Lens Shift

(0.5 x W)

Screen Center

0%

Screen Width (W)

Vidikron Vision Model 90 Owner’s Operating Manual 3-7