Throw Distance; Estimating Throw Distance - Runco SIGNATURE CINEMA SC-50d Series Installation & Operation Manual

Installation

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.

Estimating Throw Distance

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