Vidikron 90 - Manual (Page 28)

Installation
3-8 Vidikron Vision Model 90 Owner’s Operating Manual
Generally, a higher lens throw ratio means greater lens shift capability. Table 3-4 lists the lens
shift limits for each available Vision 90 lens, as percentages and absolute measurements with
a 100 x 56 inch (1.78:1) screen.
Adjusting the Projection
Angle
If the Vision 90 is ceiling-mounted and the screen is significantly lower than the projector,
you can also tilt the projector at a slight angle by adjusting the ceiling mount.
If you do this, you may need to shift the image using the on-screen display (OSD) controls, to
compensate. For detailed instructions, refer to Using the On-Screen Menus on page 4-2.
Table 3-4. Vertical and Horizontal Lens Shift Limits
Lens Option
1 2 3 4
Lens Shift Limits, as Percentages of Screen Height or Width (Notes 1 and 2)
When Only Vertical or
Only Horizontal Shift is
Used
Vertical
(Note 2)
Up 74% 82% 82% 83%
Down 24%
Horizontal
(Note 2)
Left/
Right
15%
When Maximum Vertical
Shift is Used
5% 10% 15%
When Maximum Horizon-
tal Shift is Used
Vertical
(Note 2)
Up 50% 62.5% 62.5% 83%
Down 0
Lens Shift Limits in Inches, with a 100-by-56 inch (1.78:1) Screen
When Only Vertical or
Only Horizontal Shift is
Used
Vertical
Up 41.44 45.92 45.92 46.48
Down 13.44
Horizontal
Left/
Right
15
When Maximum Vertical
Shift is Used
5 10 15
When Maximum Horizon-
tal Shift is Used
Vertical
Up 28 35 35 46.48
Down 0
Notes:
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. Lens shift within these limits does not affect image quality. Shifting beyond the maximum values will
cause image loss in corners or edges.
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