Runco VX-2c - Manual (Page 15)

14
LENS SHIFT RANGE
Lens Option 1: Throw Distance 1.2 - 1.4 x Width of Screen
Example: 56” x 100” Screen
TD = 120” to 140” lens to screen
When only Vertical or only Horizontal Shift is used:
Maximum. Vertical Shift ↑ = 60% of screen height (.60 x height)
Maximum. Vertical Shift ↓ = 24% of screen height (.24 x height)
Maximum Horizontal Shift = 10% of screen width (.10 x width)
0.24 X 56” = 13.44” up or down
0.10 X 100” = 10.0” left or right
Amount of Horizontal Shift when Vertical is @ maximum:
Maximum Horizontal Shift < 5% of screen width (.05 x width)
0.05 X 100” = 5.0” left or right
Amount of Vertical Shift when Horizontal is @ maximum:
Maximum Vertical Shift ↑ < 10% of screen height (.10 x height)
Maximum Vertical Shift ↓ < 10% of screen height (.10 x height)
0.10 X 56” = 5.6” up or down
Lens Option 2: Throw Distance 1.4 - 1.77 x Width of Screen
Example: 56” x 100” Screen
TD = 140” to 177” lens to screen
When only Vertical or only Horizontal Shift is used:
Maximum. Vertical Shift ↑ = 60% of screen height (.60 x height)
Maximum. Vertical Shift ↓ = 24% of screen height (.24 x height)
Maximum Horizontal Shift = 13% of screen width (.13 x width)
0.24 X 56” = 13.44” up or down
0.13 X 100” = 13.0” left or right
Amount of Horizontal Shift when Vertical is @ maximum:
Maximum Horizontal Shift < 5% of screen width (.05 x width)
0.05 X 100” = 5.0” left or right
Amount of Vertical Shift when Horizontal is @ maximum:
Maximum Vertical Shift ↑ < 10% of screen height (.10 x height)
Maximum Vertical Shift ↓ < 10% of screen height (.10 x height)
0.10 X 56” = 5.6” up or down
Lens Option 3: Throw Distance 1.77 - 2.35 x Width of Screen
Example: 56” x 100” Screen
TD = 177” to 235” lens to screen
When only Vertical or only Horizontal Shift is used:
Maximum. Vertical Shift ↑ = 60% of screen height (.60 x height)
Maximum. Vertical Shift ↓ = 24% of screen height (.24 x height)
Maximum Horizontal Shift = 16% of screen width (.16 x width)
0.24 X 56” = 13.44” up or down
0.16 X 100” = 16.0” left or right
Amount of Horizontal Shift when Vertical is @ maximum:
Maximum Horizontal Shift < 5% of screen width (.05 x width)
0.05 X 100” = 5.0” left or right
Amount of Vertical Shift when Horizontal is @ maximum:
Maximum Vertical Shift ↑ < 10% of screen height (.10 x height)
Maximum Vertical Shift ↓ < 10% of screen height (.10 x height)
0.10 X 56” = 5.6” up or down
Explanation:
• 0% shift is when the image center is even with the projector lens center. (Also known as zero-degree projection-angle)
• Shifting beyond the maximum values above will cause image loss in corners or edges.
• When Vertical Shift is maximum, Horizontal shift can only be adjusted 5% left or right in example above.
• The maximum diagonal movement of the image is expressed as shift in 2 directions, this is the maximum combination of adjustment.
(ex. Up & Left, Down & Right, Up & Right, Down & Left)
• Throw distance does not affect image quality.
• Lens shift does not affect image quality if within above limits.