Runco Q-650i Series, Installation & Operation Manual

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Installation
14 Q-650i Installation/Operation Manual
PRE
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IMINAR
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Throw Distance Throw distance is the distance measured from the front of the projector to the screen.
This is an important calculation in any projector installation as it determines whether or not
you have enough room to install your projector with a desired screen size and if your
image will be the right size for your screen.
You can quickly estimate the throw distance by taking the width of the screen and
multiplying it by the lens throw ratio; see Figure 3-1. The result of this calculation tells you
roughly how far back the projector should be positioned from the screen in order to
project a focused image large enough to fill the screen.
Figure 3-1. Estimating Throw Distance
Table 3-3 lists the available Q-650i lens options and their associated throw ratios.
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Table 3-3. Throw Ratios for the Q-650i
Projector Model Throw Ratio
Throw Range in inches, with 72.6x40.8-inch
(1.78:1) S creen
Minimum Maximum
Standard Q-650i 1.85 – 2.40 134.31 174.24
Standard Q-650i with
Optik A Primary Lens
1.56 – 1.86 113.26 135.03
Note: Due to normal manufacturing variances, throw distance can vary by up to +/- 5 percent from
these specifications.
E s timating Throw Di s tance
Throw Di s tance (TD) = S creen Width (w) x Len s Throw Ratio
S
creen width (w)
TD