Runco SC-1 manual Screen Lens Throw Ratio = Approximate 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 multiplying the width of the screen 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.

Screen

x Lens Throw Ratio = Approximate Throw Distance

In this example, a 1.49-1.93 zoom lens with a 15-foot wide screen results in a throw distance of

268.20to 347.40 inches

(22.35 to 28.95 feet).

Signature C Primary Lens with CineWide Anamorphic Lens (1.49-1.93)

Front of projector

							in		.
						.20	in	.
						268
					=	.40
				.	zoom)=	347
					zoom)
				(max
		1	.49	.
	x			(min
			.93
180		1
	x
180

Figure 3-1. Estimating Throw Distance

20 Runco SC-1 Owner’s Operating Manual