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Vidikron Vision Model 15 Installation/Operation Manual 19
Table 3-4 gives the lens shift limits for the Vision 15, as percentages and absolute
measurements with a 96 x 54 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 3-6. 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 3-6. Folded Optics
Table 3-4. Vertical and Horizontal Lens Shift Limits
Vision 15 Vision 15ET
Lens Shift Limits, as Percentages of Screen Height or Width (Notes 1 and 2)
Vertical
(Notes 2 and 3)
Up 50% 50%
Down 55% 75%
Horizontal
(Note 2)
Left 7.5%
Right 7.5%
Lens Shift Limits in Inches, with a 96-by-54 inch (1.78:1) Screen
Vertical
Up 27.00 27.00
Down 29.70 40.50
Horizontal
Left 7.20
Right 7.20
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