Electrohome VistaGraphX 5000, User Manual, Page: 99 / 116

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Always consult this Appendix when planning a projector installation. See 2.3,
Projector Position and Mounting for additional information.
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The correct throw distance for an installation depends on the screen size and
projector lens type present — the larger the image, the greater the distance you
must allow between the projector and screen. Once you know the screen size and
lens type present, you can calculate the throw distance required in an installation
by using the appropriate
formula as found in this
appendix.
Note that throw distance
is measured
perpendicular to the
projector front feet and
the screen but not
necessarily parallel to
the floor — i.e., the
projector and screen
may both be inclined.
Pre-calculated throw distances for the complete range of lens types and screen
sizes appear in the charts and graphs on the following pages. Refer to these
examples to quickly determine the proper throw distance for your installation.
NOTE: The variable operating ranges for zoom lenses appear in graphs only.
Formulae and charts do not apply.