Vidikron 85 - Manual (Page 31)

Installation
Vidikron Vision 85 Owner’s Operating Manual 19
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 3-2. 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 Vision 85, Vision 85/CineWide and Vision 85/CineWide
with AutoScope.
Table 3-3. Throw Ratios for the Vision 85 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
Vision 85 1.86 – 2.45 135.04 177.87 (n/a)
Vision 85/CineWide (n/a) 1.92 – 2.45 184.32 235.20
Vision 85/CineWide
with AutoScope
1.86 – 2.45 135.04 177.87 1.45 – 1.85 139.20 177.60
Estimating Throw Distance
Throw Distance (TD) = Screen Width (w) x Lens Throw Ratio
Scr
een width (w)
TD