Ceiling Mount Installation; Distance Chart - NEC GT1150 Installation Data

GT1150/2150 Installation Data
Desktop and Ceiling Mount
Projection Distance and Screen Size for Ceiling Mount
The following shows the proper relative position of the projector and screen. Refer to the table for installation data.
Distances are in inches. For millimeters multiply by 25.4.

Ceiling Mount Installation

Screen Ctr
Note: Lens shift is not available on GT10RL(rear lens). GT10RL should be used only for "zero degree/no-offset" applications.

Distance Chart

Screen Size (4:3)
Diagonal Width(H) Height (V)
inches inches
40 32
60 48
67 53.6
72 57.6
84 67.2
90 72
100 80
120 96
150 120
180 144
210 168
240 192
270 216
300 240
400 320
500 400
Note: For screen sizes not indicated on the projection tables, use the formulas on page 1.
Vertical Offset
rear lens
GT10RL
1.0:1
inches inches
24 30.4 39.6 - 49.2
36 46.8 60.6 - 75.0
40.2 52.6 67.9 - 84.0
43.2 56.7 73.1 - 90.5
50.4 66.6 85.7 - 105.9
54 71.5 92.0 - 113.7
60 79.7 102.5 - 126.6
72 96.1 123.4 - 152.3
90 120.8 154.9 - 191.0
108 145.4 186.3 - 229.7
126 170.1 217.7 - 268.3
144 194.7 249.2 - 307.0
162 219.4 280.6 - 345.7
180 244.0 312.1 - 384.3
240 NA
300 NA
Throw Distance
Throw Distance
GT13ZL GT19ZL
1.3 - 1.6:1 1.8 - 2.4:1
inches inches
56.4 - 74.3
86.2 - 113.1
96.7 - 126.7
104.1 - 136.3
122.0 - 159.6
131.0 - 171.2
145.9 - 190.6
175.7 - 229.4
220.4 - 287.5
265.2 - 345.7
309.9 - 403.9
354.6 - 462.0
399.4 - 520.2
444.1 - 578.3
NA NA
NA NA
9.7"
6.6"
Lens Centered
with Mount
zoom lenses
GT24ZL
2.4 - 3.4:1
inches
NA
111.8 - 164.2
125.4 - 183.9
135.1 - 198.0
158.4 - 231.8
170.0 - 248.7
189.5 - 276.9
228.3 - 333.2
286.6 - 417.7
344.9 - 502.2
403.1 - 586.7
461.4 - 671.2
519.7 - 755.7
578.0 - 840.2
772.2 - 1121.9
NA
Visual Systems
Rev 3.0
GT
GT34ZL
3.4 - 5.2:1
inches
NA
NA
NA
NA
231.9 - 351.3
249.0 - 376.9
277.4 - 419.5
334.2 - 504.7
419.5 - 632.6
504.7 - 760.5
590.0 - 888.4
675.3 - 1016.3
760.5 - 1144.1
845.8 - 1272.0
1130.0 - 1698.3
1414.1 - 2124.6
Page 2