Christie Mirage S+14K User Manual page 21

INSTALLATION & SETUP
lens focal length, actual throw distance can vary ±5% between lenses described as
having the same throw ratio
'
THE VERTICAL POSITION
of the projector in relation to the screen also depends on the
Vertical & Horizontal
Position
size of the screen and the lens type. Correct vertical position helps ensure that the
image will be rectangular in shape rather than keystoned (having non-parallel sides)
and that image focus and brightness both remain optimized.
If necessary, vertical position of the image can be offset—that is, moved up or down
in relation to lens center—by using the motorized offset function. Starting with no
offset, the 1400 x 1050 image from this projector can be moved up or down by a
maximum distance of 525 pixels, resulting in all of the image displayed above or
below lens center. See Table 2.1 and Figure 2.20. NOTE: Not applicable to the fixed
0.73:1 lens.
THE HORIZONTAL POSITION
of the image can be offset—that is, shifted left or right
of lens center—by using the motorized offset function. Starting with no offset, the
1400 x 1050 image from this projector can be moved left or right by a maximum
distance of 350 pixels, resulting in 75% of the image displayed to one side of lens
center. See Table 2.1 and Figure 2.21.
Table 2.1. Maximum Amount of Image Offset from Lens Center
Lens Type Offset Movement Max. Amount of Display Max. Amount of Display
Above or Below Lens Center Right or Left of Lens Center
or or
All motorized 100% 50% 1050 pixels or 100% 1050 pixels or 75%
lenses (525 pix) (350 pix)
NOTES: 1) Offsets are not available with 0.73:1 fixed lens. 2) When offset movement is stated as a percentage (see left
columns), this represents the percentage of ½ image height or½ image width 3) All offset values are ±7%.
Figure 2.20. Maximum Vertical Offset
2-15
Roadster / Mirage S+ User's Manual
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