Runco QUANTUM COLOR Q-750I - Manual (Page 30)

Installation
14 Q-750i Series Installation/Operation 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 gives the throw ratios for the Q750i Series.
➤
Table 3-3. Throw Ratios for the Q-750i 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
Standard Q-750i 1.85 – 2.40 134.31 174.24 (n/a)
Standard Q-750i
with Optik A
Primary Lens
1.56 – 1.86 113.26 135.03 (n/a)
Q-750i/CineWide
(Rainier II
Anamorphic Lens)
(n/a) 1.52 – 1.80 145.92 172.80
Q-750i/CineWide
with AutoScope
(Rainier II
Anamorphic Lens)
1.85 – 2.40 134.31 174.24 1.52 – 1.80 145.92 172.80
Q-750i/CineWide
(McKinley
Anamorphic Lens)
(n/a) 1.39 – 1.80 133.44 172.80
Estimating Throw Distance
Throw Distance (TD) = Screen Width (w) x Lens Throw Ratio
Scr
een width (w)
TD