Runco rs 440lt 用户指南
Runco RS-440 Installation/Operation Manual
15
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.
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.
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
Table 3-3 gives the throw ratios for the RS-440 Series.
Table 3-3. Throw Ratios for the RS-440 Series
Projector Model
Throw
Ratio with
Primary
Lens Only
Throw Range in
inches, with
72.6x40.8-inch
(1.78:1) Screen
Throw Ratio
with Primary
Lens and
Anamorphic
Lens
Throw Range in
inches, with
96x40.8-inch (2.35:1)
Screen
Minimum Maximum
Minimum Maximum
RS-440
1.36 - 1.70
98.74
123.42
(n/a)
RS-440LT
1.69 - 2.13
122.69
154.63
(n/a)
RS-440LT/CineWide
(n/a)
1.69 - 2.13
162.24
204.48
Estimating Throw Distance
Throw Distance (TD) = Screen Width (w) x Lens Throw Ratio
Throw Distance (TD) = Screen Width (w) x Lens Throw Ratio
Scr
een width (w)
TD