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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.
NOTE: A keystoned image can be corrected through software. See Section 3.
In addition, vertical position of the image can be manually offset—that is, moved up
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or done. Press
and
. Note that the range of adjustment depends on the type of projector as well
as lens and whether or not you are also offsetting horizontally. See Table 2.1 for the
percentage of the image that can be displayed above and below the center of each
type of lens compatible with the projector. See Figure 2.11 for average offsets (non-
VistaPro lenses only).
NOTE: Due to manufacturing tolerances, any offset range can vary ±5% or more
between lenses described as having the same throw ratio, between projectors, and
with any lens/projector combination. In addition, keep in mind that long throw
distances significantly reduce offset ranges.
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of the projector in relation to the screen also depends on the
to display the Lens Control menu, then adjust offsets with
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