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Runco VX-33i Installation/Operation Manual 19
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Table 3-4 lists the lens shift limits for each available VX-33i lens, as percentages and
absolute measurements with a 100 x 56 inch (1.78:1) screen.
Folded OpticsIn rear screen applications where space behind the projector is limited, a mirror may be
used to fold the optical path, as shown in Figure 3-5. The position of the projector and
mirror must be accurately set. If you are considering this type of installation, contact your
dealer for assistance.
Figure 3-5. Folded Optics
Table 3-4. VX-33i Vertical and Horizontal Lens Shift Limits
Lens Option
Apollo B Apollo C Apollo D
Lens Shift Limits, as Percentages of Screen Height or Width (Notes 1 and 2)
Vertical
(Note 2)
Up 30% 32% 28%
Down 61% 62% 65%
Horizontal
(Note 2)
Left 12%
Right 12%
Lens Shift Limits in Inches, with a 100-by-56 inch (1.78:1) Screen
Vertical
Up 16.80 17.92 15.68
Down 34.16 34.72 36.40
Horizontal
Left 12.00
Right 12.00
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. Vertical lens shift figures apply to ceiling mount configurations. For floor installations
(where the projector is upright), reverse the up/down vertical offset percentages.
Screen
Mirror