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Always consult this section when planning a projector installation. See also section 2.7 and 2.8, Projector
Position and Mounting.
Calculating Throw Distance
Correct throw distance depends on the screen size and lens present-the larger the image needed,
the greater the distance you must allow between the lens and screen. Once you know the screen
size and lens type present, you can calculate the precise throw distance you require by using the
appropriate formula as found in this appendix.
Throw distance is the distance between the projector front feet and the screen. This measurement
is not necessarily parallel to the floor-i.e., the projector and screen may be inclined.
NOTE: If your projector is tilted
up or down in relation to the
screen, as is sometimes the case
for large venues or elevated
installations, throw distance still
represents the smallest measure-
ment between the screen and
front feet centers.
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 prop-
er throw distance (±5%) for your installation and lens.
NOTE: Variable operating ranges for zoom lenses appear in graphs only.
INSTALLATION AND SETUP
2-8