Vidikron Vision 90t - Manual (Page 26)

Installation
16 Vidikron Vision Model 90t and Model 100t Owner’s Operating Manual
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 lists the available lens options for the Vision 90t/100t and their respective throw
ratios.
➤
Table 3-3. Vision 90t/100t Lens Options and Throw Ratios
Lens Option
(Note 2)
Throw Ratio
with Primary
Lens Only
Throw Range in inches,
with 96x54-inch (1.78:1)
Screen
Throw Ratio
with Primary
Lens and
Anamorphic
Lens
Throw Range in inches,
with 126.9x54-inch
(2.35:1) Screen
Minimum Maximum Minimum Maximum
1 1.45 - 1.76 139.20 168.96 Not Applicable (Note 2)
2 1.82 - 2.39 174.72 229.44 1.39 - 1.77 176.39 224.61
3 2.42 - 3.57 232.32 342.72 1.84 - 2.64 233.50 335.02
4 3.63 - 5.72 348.48 549.12 2.75 - 4.26 348.98 540.59
Notes:
1. Throw distance does not affect image quality, provided these ranges are taken into account.
2. Only lens options 2, 3 and 4 can be used with the optional CineWide (secondary anamorphic) lens. Doing
so affects the throw distances as shown here.
Estimating Throw Distance
Throw Distance (TD) = Screen Width (w) x Lens Throw Ratio
Scr
een width (w)
TD