Runco VX-5000d manual VX-4000d Lens Options and Throw Ratios, Throw Distance, Minimum Maximum

Installation

Throw distance is the distance measured from the front of the projector to the screen.	Throw Distance
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 3-2.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-4000d Throw Ratio: refer to Table 3-3

VX-5000d Throw Ratio: refer to Table 3-4

Screen	width
		(w)

TD

Figure 3-2. Estimating Throw Distance

Throw Distance Ranges - VX-4000d:Table 3-3lists the available lens options for the VX-4000d and their associated throw ratios.

Table 3-3. VX-4000d 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
Proteus A	0.64 (Fixed)		For rear-screen installations only. Contact
			Runco Technical Support for more information.
Proteus B	1.22 - 1.44		122	144
Proteus C	1.45 - 1.76		145	176
Proteus D	1.82 - 2.39		182	239
Proteus D with CineWide	1.38 - 1.80		138	180
Proteus E	2.42 - 3.57		242	357
Proteus E with CineWide	1.84 - 2.70		184	270

Notes:

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

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

Runco VX-4000d/VX-5000d Owner’s Operating Manual 23