Runco VX-33D operation manual VX-33d Lens Options and Throw Ratios

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 3-3lists the available lens options for the VX-33d and their associated throw ratios.

Table 3-3. VX-33d Lens Options and Throw Ratios

		Throw Range in		Throw Ratio	Throw Range in
		inches, with			inches, with
Lens Option	Throw Ratio			with Primary
		96x54-inch (1.78:1)			126.9x54-inch (2.35:1)
(Note 2)	with Primary	Screen		Lens and	Screen
	Lens Only			Anamorphic
				Lens
		Minimum	Maximum		Minimum	Maximum
Apollo B	1.40 - 1.81	134.40	173.76	Not Applicable (Note 2)
Apollo C	1.85 - 2.53	177.60	242.88	1.40 - 1.90	177.66	241.11
Apollo D	2.65 - 4.20	254.40	403.20	2.02 - 3.15	256.34	399.73

Notes:

1. Throw distance does not affect image quality, provided these ranges are taken into account.

2. Only the Apollo C and D lenses can be used with the optional CineWide (secondary anamorphic) lens. Doing so affects the throw distances as shown here.

18 Runco VX-33d Installation/Operation Manual