D Throw Distance - Christie Mirage S+14K User Manual

A p p e n d i x D
Throw Distance
Always consult this Appendix when planning a projector installation. See also 2.3, Projector Position and Mounting.
Calculating Throw Distance
Figure D-1. 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 (Figure D-1).
This measurement is not necessarily parallel to the floor—i.e., the projector and screen may
both be inclined.
NOTE: If your projector is tilted up or down in relation to the screen, typical in large
venues or elevated installations, throw distance still represents the smallest
measurement between the screen and front feet center axes.
Figure D-1 provides the recommended throw distance formulas for each of the
"Compact" Thunder Lenses. 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 (±5%) for
your installation and lens.
D-1
Roadster / Mirage S+ User's Manual
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