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18 Signature Cinema™ SC-50d/SC-60d Installation/Operation Manual
PRE
L
IMINAR
Y
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 SC-50d/SC-60d lens options and their throw ratios.
➤
Table 3-3. SC-50d/SC-60d Lens Options and Throw Ratios (Note)
Lens Option
Throw Ratio
with Primary
Lens Only
Throw Range in
inches, with
120x67.5-inch (1.78:1)
Screen
Throw Ratio
with Primary
Lens and
Anamorphic
Lens
Throw Range in
inches, with
158.6x67.5-inch
(2.35:1) Screen
Minimum Maximum Minimum Maximum
Athena Uno
0.67 (Fixed)
For rear-screen installa-
tions only. Contact
Runco Technical Support
for more information.
Athena Uno cannot be used with an
anamorphic lens.
Athena Dos
1.39 - 1.85 166.80 222.00 1.20 - 1.39 190.36 220.50
Athena Tres
1.85 - 2.59 222.00 310.80 1.39 - 1.94 220.50 307.74
Athena
Quatro
2.59 - 4.16 310.80 499.20 1.94 - 3.12 307.74 494.93
Athena
Cinco
4.16 - 6.93 499.20 831.60 3.12 - 5.20 494.93 824.88
Note: Due to normal manufacturing variances, throw distance can vary by up to +/- 5 percent from
these specifications.
Estimating Throw Distance
Throw Distance (TD) =
Screen Width (w) x Lens Throw Ratio
Screen width (w)
TD