NEC VT676 VT470/570/670/575/676 IG - Page 2

Diagrams and Distance Charts - specifications

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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 Mounted Screen Top D Lens Ctr C Throw Distance 6.1" 5.5" α B Screen Ctr Lens Offset from Mount Pipe 2.7" Desktop Screen Ctr B Lens Ctr Screen Bottom D C Throw Distance α 2.5" Distance chart for popular 4:3 screens 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. Screen Size (4:3) B Diag W H inches inches inches inches 21 16.8 12.6 5.0 60 48 36 14.3 72 57.6 43.2 17.2 84 67.2 50.4 20.1 90 72 54 21.5 100 80 60 23.9 120 96 72 28.7 150 120 90 35.8 180 144 108 43.0 200 160 120 47.8 250 200 150 59.7 300 240 180 71.7 C wide - tele inches NA - 28.7 69.7 - 84.6 83.9 - 101.8 98.1 - 119.0 105.2 - 127.6 117.1 - 141.9 140.8 - 170.6 176.3 - 213.6 211.9 - 256.5 235.6 - 285.2 294.8 - 356.9 354.1 - 428.5 D inches 1.3 3.7 4.4 5.1 5.5 6.1 7.3 9.2 11.0 12.2 15.3 18.3 α wide - tele degrees NA - 9.9 11.6 - 9.6 11.6 - 9.6 11.6 - 9.6 11.5 - 9.6 11.5 - 9.6 11.5 - 9.5 11.5 - 9.5 11.5 - 9.5 11.5 - 9.5 11.5 - 9.5 11.4 - 9.5 www.necvisualsystems.com VT470/570/575/670/676 Page 2 of 6

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www.necvisualsystems.com
VT470/570/575/670/676
Page 2 of 6
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
Mounted
Desktop
Distance chart for popular 4:3 screens
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.
B
D
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
Throw Distance
Screen Bottom
Screen Ctr
2.5"
α
Lens Ctr
C
D
B
Screen Top
α
Screen Ctr
Lens Offset from
Mount Pipe
Lens Ctr
Throw Distance
5.5"
C
6.1"
2.7"
D
B