Vidikron operation manual Vision 120 Vertical and Horizontal Lens Shift Limits, Folded Optics

Installation

Table 3-4lists the lens shift limits for each available Vision 120 lens, as percentages and absolute measurements with a 100 x 56 inch (1.78:1) screen.

Table 3-4. Vision 120 Vertical and Horizontal Lens Shift Limits

				Lens Option
		A1	A2	B	C		D	E
Lens Shift Limits, as Percentages of Screen Height or Width (Notes 1 and 2)
Vertical	Up	10%	31%	30%	32%		28%	30%
(Note 2)
	Down	10%	71%	61%	62%		65%	63%
Horizontal	Left	5%	17%			12%
(Note 2)
	Right	5%	17%			12%
	Lens Shift Limits in Inches, with a 100-by-56 inch (1.78:1) Screen
Vertical	Up	5.60	17.36	16.80	17.92		15.68	16.80
	Down	5.60	39.76	34.16	34.72		36.40	35.28
Horizontal	Left	5.00	17.00			12.00
	Right	5.00	17.00			12.00
Notes:
1. With no vertical or horizontal lens shift, the lens center and screen center are aligned with each other.
2. Vertical shift limits are percentages of the screen height. Horizontal shift limits are percentages of the
screen width.
3. Vertical lens shift figures apply to ceiling mount configurations. For floor installations (where the
projector is upright), reverse the up/down vertical offset percentages.

In rear screen applications where space behind the projector is limited, a mirror may be used		Folded Optics
to fold the optical path, as shown in Figure 3-5.The position of the projector and mirror must
be accurately set. If you are considering this type of installation, contact your dealer for
assistance.
Screen	Mirror

Figure 3-5. Folded Optics

Vidikron Vision Model 120 Installation/Operation Manual 21