NEC LCDMT850 Installation Data

Visual Systems Division
Technical Bulletin
MT850 Installation Data
with Standard Zoom Lens (1.8 - 2.2:1)
Contents
Product Description, Lens Specs, Notes and Formulas
Projection Distances and Screen Sizes
Ceiling Mount Installation
Desktop Setup
Cabinet Dimensions
Top, Front and Right Side
Bottom, Back and Left Side
Ceiling Mount Dimensions
Timing Chart
PC Control Codes
Product Description
Type: 3 panel, 1.3" p-Si TFT LCD projector
Native Resolution: 800 x 600
Brightness: 1700 ANSI Lumens
Lens Specifications
Standard Zoom Lens
Throw Ratio: 1.76 - 1.84:1(Wide) / 2.13 - 2.21:1(Tele)
Offset Angle: 9.9 - 10.4(Wide) / 8.3 - 8.6(Tele)
Screen Sizes: 30" - 300" Diagonal
Notes
§
For Screen Sizes of 30 to 300 inches not indicated on the projection tables, use the formulas below.
§
If the figures on the tables do not match the results of formulas, use the figures in the table.
§
The ceiling must be strong enough to support the LCD projector and the installation must be in accordance with any local
building codes.
All calculations are based on 4:3 aspect ratio.
Distances are in inches, for millimeters multiply by 25.4.
Distances may vary 5%.
Formulas
Units: Inches (for millimeters multiply final number by 25.4)
D = Screen Diagonal (4:3)
H = D x 0.8
V = D x 0.6
M = 0.96212H
B = 0.3346M
C (Wide) = 1.9216M - 2.18
C (Tele) = 2.3059M - 2.18
D = 0.0585M
-1
(wide) = tan (B/C(wide))
-1
(tele) = tan (B/C(tele))
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Dimensions: 11.1"(W) x 4.8"(H) x 14.3"(D)
Weight:
Focal Length:
F/#:
Focus Adjustment:
H = Screen Width (4:3)
V = Screen Height (4:3)
M = Projection magnification
B = Vertical distance between lens center and screen center
C = Throw distance
D = Vertical distance between lens center and top of screen (bottom of screen
= Throw angle
13 lbs
48.6 - 58.4mm
2.3 - 2.7
Manual Focus / Manual Zoom
for desktop application)
Rev. 1.6
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