Christie CP2000-X, User Manual

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INSTALLATION & SETUP
2-10
CP2000-X User Manual
020-100031-01 Rev. 1 (03-2009)
Figure 2.11. Estimating Throw Distance: Example
As shown in Figure 2.10, throw distance is approximately equal to the full horizontal
width of the screen multiplied by the type of lens you are using. For example, if you
are using a 1.25:1 lens, the proper throw distance value will be approximately 25%
more than that of the full screen width. Once you know your screen width and lens,
you can estimate throw distance needed. Or, if you know the available throw distance
beforehand, you can determine what images sizes are possible with a given zoom
lens.
IMPORTANT:
For proper placement in any installation, use the throw distance
formula provided for your lens. In addition, please keep in mind that due to lens
manufacturing tolerances for lens focal length, actual throw distance can vary ±5% or
more between lenses described as having the same throw ratio.