Vidikron 90 manual Vertical and Horizontal Lens Shift Limits, Adjusting the Projection, Angle

Installation

Generally, a higher lens throw ratio means greater lens shift capability. Table 3-4lists the lens shift limits for each available Vision 90 lens, as percentages and absolute measurements with a 100 x 56 inch (1.78:1) screen.

Table 3-4. Vertical and Horizontal Lens Shift Limits

					Lens Option
				1	2		3	4
	Lens Shift Limits, as Percentages of Screen Height or Width (Notes 1 and 2)
	When Only Vertical or	Vertical	Up	74%	82%		82%	83%
		(Note 2)
	Only Horizontal Shift is		Down			24%
	Used
		Horizontal	Left/			15%
	When Maximum Vertical
		(Note 2)	Right	5%			10%	15%
	Shift is Used
	When Maximum Horizon-	Vertical	Up	50%	62.5%		62.5%	83%
	tal Shift is Used	(Note 2)	Down			0
	Lens Shift Limits in Inches, with a 100-by-56 inch (1.78:1) Screen
	When Only Vertical or	Vertical	Up	41.44	45.92		45.92	46.48
			Down			13.44
	Only Horizontal Shift is
	Used
			Left/			15
		Horizontal
	When Maximum Vertical
			Right	5			10	15
	Shift is Used
	When Maximum Horizon-	Vertical	Up	28	35		35	46.48
	tal Shift is Used		Down			0
	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. Lens shift within these limits does not affect image quality. Shifting beyond the maximum values will
	cause image loss in corners or edges.
Adjusting the Projection ➤
	If the Vision 90 is ceiling-mounted and the screen is significantly lower than the projector,
Angle	you can also tilt the projector at a slight angle by adjusting the ceiling mount.

If you do this, you may need to shift the image using the on-screen display (OSD) controls, to compensate. For detailed instructions, refer to Using the On-Screen Menus on page 4-2.

3-8 Vidikron Vision Model 90 Owner’s Operating Manual