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Installation
20 Runco VX-44d/-55d Owner’s Operating Manual
PRE
L
IMINAR
Y
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.
Figure 3-1. Estimating Throw Distance
Table 3-3 lists the available lens options for the VX-44d/-55d and their associated throw
ratios.
➤
Table 3-3. VX-44d/-55d Lens Options and Throw Ratios
Lens Option
(Note 2)
Throw Ratio
with Primary
Lens Only
Throw Range in
inches, with
96x54-inch (1.78:1)
Screen
Throw Ratio
with Primary
Lens and
Anamorphic
Lens
Throw Range in
inches, with
126.9x54-inch (2.35:1)
Screen
Minimum Maximum Minimum Maximum
Telesto B
1.37 - 1.64 131.52 157.44
Not Applicable (Note 2)
Telesto C
1.69 - 2.27 162.24 217.92
Telesto D
2.38 - 4.00 228.48 384.00 1.79 - 3.09 227.15 392.12
Telesto E
4.18 - 6.60 401.28 633.60 3.18 - 5.06 403.54 642.11
Notes:
1. Throw distance does not affect image quality, provided these ranges are taken into account.
2. Only the Telesto D and E 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-44d/-55d Throw Ratio: refer to Table 3-3