Runco VX-50d manual VX-40d/-50d Lens Options and Throw Ratios, Throw Ratio Throw Distance Range

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

VX-40d/-50d Throw Ratio: refer to Table 3-3

VX-60d/-80d Throw Ratio: refer to Table 3-4

Screen	width
		(w)

TD

Figure 3-1. Estimating Throw Distance

Throw Distance Ranges - VX-40d/-50d:Table 3-3lists the available lens options for the VX-40d/-50d and their associated throw ratios.

Table 3-3. VX-40d/-50d Lens Options and Throw Ratios

	Throw Ratio		Throw Distance Range
			(in inches, with 100-inch Wide Screen)
Lens Option (Note 2)	(Throw Dist.	⎟
	Screen Width)
			Minimum	Maximum
Telesto A	0.8 (Fixed)		For rear-screen installations only. Contact
			Runco Technical Support for more information.
Telesto B	1.65 - 1.95		165	195
Telesto C	2.04 - 2.73		204	273
Telesto C with CineWide	1.55 - 2.01		155	201
Telesto D	2.86 - 4.83		286	483
Telesto D with CineWide	2.17 - 3.60		217	360
Telesto E	4.96 - 7.90		496	790
Telesto E with CineWide	3.76 - 5.90		376	590

Notes:

1. Throw distance does not affect image quality, provided these ranges are taken into account.

2. Only the Telesto C, D and E lenses can be used with the optional CineWide (secondary anamorphic) lens. Doing so affects the throw distances as shown here.

20 Runco VX-40d/-50d/-60d/-80d Owner’s Operating Manual