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Vertical and horizontal position, Figure 3-3 . projector placement, Vertical lens shift – Vidikron Vision Model 85 User Manual

Page 32: Figure 3-4 . vertical lens shift (example only), 3. projector placement, 4. vertical lens shift (example only), Pre l iminar y

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Installation

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Vidikron Vision 85 Owner’s Operating Manual

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Vertical and Horizontal

Position

Proper placement of the projector relative to the screen will yield a rectangular,
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 3-3.

Figure 3-3. Projector Placement

Vertical Lens Shift

If it is not possible to align the projector and screen as shown in Figure 3-3, you can use 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 3-4.

Figure 3-4. Vertical Lens Shift (EXAMPLE ONLY)

Height

Projection Distance

Ceiling

Ceiling Installation

Screen

Height

Floor

Lens Center

Projection Distance

Floor Installation

Lens Center

x

Lens Center

x

Screen

Lens Center

50% Height

Lens Shift

(0.5 x H)

100% Height

Lens Shift

(1.0 x H)

Screen Center

0%

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.