www.necvisualsystems.com GT1150/2150 Page 3 of 10Desktop SetupThe following diagram shows 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.Note: See Page 4 and 5 for lens shift range for each lens.Note: Lens shift is not available on GT10RL/GT10RLB (rear lenses). GT10RL/GT10RLB should be used only for “zero degree/no-offset” applications.Distance Chart (for popular screen sizes)Note: For screen sizes not indicated on the chart, use the formulas on page 1.Note: “NA” means it is outside the screen range for that lens. Refer to “Screen Sizes” in the Lens Specifications on Page 1.*GT10RLB and GT20ZL may need a metal plate removed at the back of the lens to achieve full screen size range (see page 6).Throw DistanceScreen Ctr4.65"Shift -Factory PresetShift +GT10RL(discontinued) GT10RLB*Diag W H 1.0:1 1.08:1inches inches inches inches inches40 32 24 30.4 32.8 39.6 - 49.2 56.4 - 74.3 65.6 - 87.260 48 36 46.8 50.2 60.6 - 75.0 86.2 - 113.1 100.3 - 132.7 111.8 - 164.267 53.6 40.2 52.6 56.3 67.9 - 84.0 96.7 - 126.7 112.5 - 148.7 125.4 - 183.972 57.6 43.2 56.7 60.6 73.1 - 90.5 104.1 - 136.3 121.2 - 160.1 135.1 - 198.084 67.2 50.4 66.6 71.1 85.7 - 105.9 122.0 - 159.6 142.0 - 187.4 158.4 - 231.8 231.9 - 351.390 72 54 71.5 76.3 92.0 - 113.7 131.0 - 171.2 152.5 - 201.1 170.0 - 248.7 249.0 - 376.9100 80 60 79.7 85.0 102.5 - 126.6 145.9 - 190.6 169.9 - 223.9 189.5 - 276.9 277.4 - 419.5120 96 72 96.1 102.5 123.4 - 152.3 175.7 - 229.4 204.6 - 269.4 228.3 - 333.2 334.2 - 504.7150 120 90 120.8 128.6 154.9 - 191.0 220.4 - 287.5 256.8 - 337.8 286.6 - 417.7 419.5 - 632.6180 144 108 145.4 154.7 186.3 - 229.7 265.2 - 345.7 308.9 - 406.1 344.9 - 502.2 504.7 - 760.5200 160 120 161.9 172.2 207.3 - 255.5 295.0 - 384.5 343.7 - 451.7 383.7 - 558.5 561.6 - 845.8240 192 144 194.7 NA 249.2 - 307.0 354.6 - 462.0 413.2 - 542.8 461.4 - 671.2 675.3 - 1016.3250 200 150 203.0 NA 259.7 319.9 369.6 481.4 430.6 565.6 480.8 699.4 703.7 1058.9270 216 162 219.4 NA 280.6 - 345.7 399.4 - 520.2 465.4 - 611.2 519.7 - 755.7 760.5 - 1144.1300 240 180 244.0 NA 312.1 - 384.3 444.1 - 578.3 517.6 - 679.5 578.0 - 840.2 845.8 - 1272.0400 320 240 NA NA 772.2 - 1121.9 1130.0 - 1698.3500 400 300 NA NA 1414.1 - 2124.6GT20ZL*inches2.1 - 2.8:1NANANA NANANA NA1.3 - 1.6:1 1.8 - 2.4:1inchesinchesNAGT24ZL/24ZLB GT34ZL/34ZLB2.4 - 3.4:1inches inchesNARear LensesScreen Size (4:3)Throw DistanceNAZoom Lenses3.4 - 5.2:1NAGT13ZL/13ZLB GT19ZL/19ZLB(check availability)NA