Runco SC-60D, SC-50D operation manual TD -1.Estimating Throw Distance

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

S
creen	width
		(w)

TD

Figure 3-1. Estimating Throw Distance

Table 3-3lists 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 Range in		Throw Ratio	Throw Range in
		inches, with			inches, with
	Throw Ratio			with Primary
		120x67.5-inch (1.78:1)			158.6x67.5-inch
Lens Option	with Primary			Lens and
	Lens Only	Screen		Anamorphic	(2.35:1) Screen
				Lens
		Minimum	Maximum		Minimum	Maximum
		For rear-screen installa-
Athena Uno	0.67 (Fixed)	tions only. Contact		Athena Uno cannot be used with an
		Runco Technical Support		anamorphic lens.
		for more information.
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	2.59 - 4.16	310.80	499.20	1.94 - 3.12	307.74	494.93
Quatro
Athena	4.16 - 6.93	499.20	831.60	3.12 - 5.20	494.93	824.88
Cinco

Note: Due to normal manufacturing variances, throw distance can vary by up to +/- 5 percent from these specifications.

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