Throw Distance; Estimating Throw Distance - Runco Q-750i Installation And 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 Q750i Series.
Table 3-3. Throw Ratios for the Q-750i Series
Projector Model
Standard Q-750i
Standard Q-750i
with Optik A
Primary Lens
Q-750i/CineWide
(Rainier II
Anamorphic Lens)
Q-750i/CineWide
with AutoScope
(Rainier II
Anamorphic Lens)
Q-750i/CineWide
(McKinley
Anamorphic Lens)
T D
Throw Range in
Throw inches, with
Ratio with 72.6x40.8-inch
Primary (1.78:1) Screen
Lens Only
Minimum Maximum
1.85 – 2.40 134.31
1.56 – 1.86 113.26
(n/a)
1.85 – 2.40 134.31
(n/a)
14
Throw Ratio
with
Primary 96x40.8-inch (2.35:1)
Lens and
Anamorphic
Minimum Maximum
Lens
174.24
135.03
1.52 – 1.80
174.24 1.52 – 1.80
1.39 – 1.80
Q-750i Series Installation/Operation Manual
Throw Range in
inches, with
Screen
(n/a)
(n/a)
145.92 172.80
145.92 172.80
133.44 172.80