NEC LT265 Installation Manual page 2

Diagrams and Distance Charts for 4:3 Screens
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
Lens Ctr
D
B
Screen Ctr
Desktop
Screen Ctr
B
D
Lens Ctr
Distance chart for popular 4:3 screens
Note: For screen sizes not indicated on the chart,
use the formulas on page 1.
www.necvisualsystems.com
Screen Top
Screen Bottom
C
Throw Distance
C
Throw Distance
Screen Size (4:3)
B
Diag W H
inches inches inches inches
30 24 18 12.6
60 48 36 25.2
72 57.6 43.2 30.2
84 67.2 50.4 35.3
90 72 54 37.8
100 80 60 42.0
120 96 72 50.4
150 120 90 63.0
180 144 108 75.6
200 160 120 84.0
250 200 150 105.1
300 240 180 126.1
350 280 210 147.1
400 320 240 168.1
450 360 270 189.1
500 400 300 210.1
5.8"
α
α
3.3"
C
D
wide - tele wide - tele
inches degrees
inches
45.6 - 56.0 3.6 15.4 - 12.7
93.5 - 114.1 7.2 15.1 - 12.4
112.7 - 137.4 8.6 15.0 - 12.4
131.9 - 160.6 10.1 15.0 - 12.4
141.5 - 172.2 10.8 15.0 - 12.4
157.4 - 191.6 12.0 14.9 - 12.4
189.4 - 230.3 14.4 14.9 - 12.3
237.3 - 288.4 18.0 14.9 - 12.3
285.3 - 346.6 21.6 14.8 - 12.3
317.2 - 385.3 24.0 14.8 - 12.3
397.1 - 482.1 30.1 14.8 - 12.3
477.1 - 579.0 36.1 14.8 - 12.3
557.0 - 675.8 42.1 14.8 - 12.3
636.9 - 772.7 48.1 14.8 - 12.3
716.8 - 869.5 54.1 14.8 - 12.3
796.7 - 966.4 60.1 14.8 - 12.3
LT265
6.5"
Lens offset from
mount center
2.5"
α
Page 2 of 7