Appendix C: Positioning the image
Digital Projection E-Vision 4000 Series
Appendix C: Positioning the image
Whenever possible, position the
projector so that the lens is
centered for the highest quality
image
The normal position for the projector is at the center of the screen. However, you can set the projector above or below the center, or to one side, and adjust the
image using the
Lens shift
feature (known as
rising and falling front
) to maintain a geometrically correct image.
Combined shift is reduced
Full horizontal or vertical shift
Any single adjustment outside the
ranges specified on the following
page may result in an
unacceptable level of distortion,
particularly at the corners of the
image, due to the image passing
through the periphery of the lens
optics.
If the lens is to be shifted in two
directions combined, the
maximum range without distortion
will be somewhat less, as can be
seen in the illustrations.
Reference Guide
Rev A December 2021
page 67
Notes
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