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Signature Cinema™ SC-50d/SC-60d Installation/Operation Manual

PRE

IMINAR

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.

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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

Scr

een width (w)