Throw Distance; Estimating Throw Distance - Runco Quantum Color Q-750i Series Installation & Operation Manual

Installation

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.

Estimating Throw Distance

Throw Distance (TD) = Screen Width (w) x Lens Throw Ratio
Figure 3-1. Estimating Throw Distance
Table 3-3 gives the throw ratios for the Q-750i Series.
Table 3-3. Throw Ratios for the Q-750i Series (Note)
Throw
Ratio with
Projector Model
Primary
Lens Only
Standard Q-750i
1.85 – 2.40
Standard Q-750i
with Short-Throw
1.56 – 1.86
Primary Lens
Q-750i/CineWide
(Rainier II
Anamorphic Lens)
Q-750i/CineWide
with AutoScope
1.85 – 2.40
(Rainier II
Anamorphic Lens)
Note: Due to normal manufacturing variances, throw distance can vary by up to +/- 5 percent from
these specifications.
T D
Throw Range in
inches, with
72.6x40.8-inch
(1.78:1) Screen
Minimum Maximum
134.31 174.24
113.26 135.03
(n/a)
134.31 174.24
14
Throw Ratio Throw Range in
with inches, with
Primary 96x40.8-inch (2.35:1)
Lens and
Anamorphic
Minimum Maximum
Lens
(n/a)
(n/a)
1.52 – 1.80 145.92
1.52 – 1.80 145.92
Q-750i Series Installation/Operation Manual
Screen
172.80
172.80