NEC VT670/K - Diagrams and Distance Charts

Diagrams and Distance Charts
The following diagrams show the relationship between projector position and the screen. Refer to the chart below for data.
Distances are in inches. For millimeters multiply by 25.4.
Ceiling
Screen Top
α
Screen Ctr
Lens Offset from
Mount Pipe
Lens Ctr
Throw Distance
5.5"
C 6.1"
2.7"
D
B
Mounted
Throw Distance
Screen Bottom
Screen Ctr
2.5"
α
Lens Ctr
C
D
B
Desktop
Distance chart for popular 4:3 screens
BD
Diag W H wide
-
tele wide
-
tele
inches inches inches inches inches
21 16.8 12.6 5.0 NA
-
28.7 1.3 NA
-
9.9
60 48 36 14.3 69.7
-
84.6 3.7 11.6
-
9.6
72 57.6 43.2 17.2 83.9
-
101.8 4.4 11.6
-
9.6
84 67.2 50.4 20.1 98.1
-
119.0 5.1 11.6
-
9.6
90 72 54 21.5 105.2
-
127.6 5.5 11.5
-
9.6
100 80 60 23.9 117.1
-
141.9 6.1 11.5
-
9.6
120 96 72 28.7 140.8
-
170.6 7.3 11.5
-
9.5
150 120 90 35.8 176.3
-
213.6 9.2 11.5
-
9.5
180 144 108 43.0 211.9
-
256.5 11.0 11.5
-
9.5
200 160 120 47.8 235.6
-
285.2 12.2 11.5
-
9.5
250 200 150 59.7 294.8
-
356.9 15.3 11.5
-
9.5
300 240 180 71.7 354.1
-
428.5 18.3 11.4
-
9.5
Screen Size
(4:3)
C
inches
α
degrees
Note: For screen sizes not indicated on the chart,
use the formulas on page 1.
Note: “NA” means it is outside lens range for that
part of the zoom. Refer to “Screen Sizes” in Lens
Specifications on Page 1.
www.necvisualsystems.com VT470/570/670 Page 2 of 6