Runco Q-750I operation manual Throw Ratios for the Q-750i Series, Primary

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

Screen	width
		(w)

TD

Figure 3-1. Estimating Throw Distance

Table 3-3gives the throw ratios for the Q750i Series.

Table 3-3. Throw Ratios for the Q-750i Series

		Throw Range in		Throw Ratio	Throw Range in
	Throw	inches, with		with	inches, with
Projector Model	Ratio with	72.6x40.8-inch		Primary	96x40.8-inch (2.35:1)
	Primary	(1.78:1) Screen		Lens and	Screen
	Lens Only			Anamorphic
		Minimum	Maximum		Minimum	Maximum
				Lens
Standard Q-750i	1.85 – 2.40	134.31	174.24		(n/a)
Standard Q-750i
with Optik A	1.56 – 1.86	113.26	135.03		(n/a)
Primary Lens
Q-750i/CineWide
(Rainier II		(n/a)		1.52 – 1.80	145.92	172.80
Anamorphic Lens)
Q-750i/CineWide
with AutoScope	1.85 – 2.40	134.31	174.24	1.52 – 1.80	145.92	172.80
(Rainier II
Anamorphic Lens)
Q-750i/CineWide
(McKinley		(n/a)		1.39 – 1.80	133.44	172.80
Anamorphic Lens)

14 Q-750i Series Installation/Operation Manual