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Runco VX-4000d/VX-5000d Owner’s Operating Manual 23
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Throw DistanceThrow 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 3-2. 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.
Figure 3-2. Estimating Throw Distance
Throw Distance Ranges - VX-4000d: Table 3-3 lists the available lens options for the
VX-4000d and their associated throw ratios.
Table 3-3. VX-4000d Lens Options and Throw Ratios
Lens Option (Note 2)
Throw Ratio
(Throw Dist. ÷
Screen Width)
Throw Distance Range
(in inches, with 100-inch Wide Screen)
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.
Estimating Throw Distance
Throw Distance (TD) = Screen Width (w) x Lens Throw Ratio
Screen width (w)
TD
VX-4000d Throw Ratio: refer to Table 3-3
VX-5000d Throw Ratio: refer to Table 3-4