NEC LT157 - Warranty Coverage Details; How to Obtain Warranty Service; Warranty Limitations and Exclusions; Contact Information

Visual Systems
LT157/158 Installation Data
Desktop and Ceiling Mount ver 1.5
Page 3
Projection Distance and Screen Size for Desktop
The following diagram shows the relationship between projector position and the screen.
Distances are in inches. For millimeters multiply by 25.4.
Desktop Setup
D
B
α
Screen Ctr
Scrn Bottom
Lens Ctr
Throw Distance
C
1.6"
Projector Feet
Distance Chart
BD
Diagonal Width(H) Height (V)
inches inches inches inches inches
25 20 15 6.0 NA - 45.9 1.5 NA - 7.4
40 32 24 9.5 62.1 - 75.0 2.5 8.7 - 7.3
60 48 36 14.3 94.4 - 113.8 3.7 8.6 - 7.2
67 53.6 40.2 16.0 105.7 - 127.4 4.1 8.6 - 7.2
72 57.6 43.2 17.2 113.8 - 137.1 4.4 8.6 - 7.1
84 67.2 50.4 20.1 133.2 - 160.4 5.1 8.6 - 7.1
90 72 54 21.5 142.9 - 172.0 5.5 8.5 - 7.1
100 80 60 23.9 159.1 - 191.4 6.1 8.5 - 7.1
120 96 72 28.6 191.4 - 230.3 7.4 8.5 - 7.1
150 120 90 35.8 240.0 - 288.5 9.2 8.5 - 7.1
180 144 108 43.0 288.5 - 346.7 11.0 8.5 - 7.1
210 168 126 50.1 337.0 - 404.9 12.9 8.5 - 7.1
240 192 144 57.3 385.5 - 463.1 14.7 8.5 - 7.1
270 216 162 64.5 434.0 - NA 16.5 8.4 - NA
300 240 180 71.6 482.5 - NA 18.4 8.4 - NA
inches
α
degrees
Screen Size (4:3)
wide - tele
C
wide - tele
Note: For screen sizes not indicated on the projection tables, use the formulas on page 1.