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

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Image 27
Vidikron 90 manual Vertical Lens Shift