Visual Systems Division
Technical Bulletin
MT850 Installation Data
with Standard Zoom Lens (1.8 – 2.2:1)
Rev. 1.6
Page 1
Contents
Product Description, Lens Specs, Notes and Formulas
Page 1
Projection Distances and Screen Sizes
Ceiling Mount Installation
Page 2
Desktop Setup
Page 3
Cabinet Dimensions
Top, Front and Right Side
Page 4
Bottom, Back and Left Side
Page 5
Ceiling Mount Dimensions
Page 6
Timing Chart
Page 7
PC Control Codes
Page 8
Product Description
Type:
3 panel, 1.3” p-Si TFT LCD projector
Dimensions: 11.1”(W) x 4.8”(H) x 14.3”(D)
Native Resolution:
800 x 600
Weight:
13 lbs
Brightness:
1700 ANSI Lumens
Lens Specifications
Standard Zoom Lens
Throw Ratio:
1.76 – 1.84:1(Wide) / 2.13 – 2.21:1(Tele)
Focal Length:
48.6 – 58.4mm
Offset Angle:
9.9 – 10.4(Wide) / 8.3 – 8.6(Tele)
F/#:
2.3 – 2.7
Screen Sizes:
30” – 300” Diagonal
Focus Adjustment:
Manual Focus / Manual Zoom
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
H
= Screen Width (4:3)
V
= D x 0.6
V
= Screen Height (4:3)
M
= 0.96212H
M
= Projection magnification
B
= 0.3346M
B
= Vertical distance between lens center and screen center
C
(Wide) = 1.9216M – 2.18
C
= Throw distance
C
(Tele) = 2.3059M – 2.18
D
= 0.0585M
D
= Vertical distance between lens center and top of screen (bottom of screen
for desktop application)
α
(wide) = tan
-1
(B/C(wide))
α
= Throw angle
α
(tele) = tan
-1
(B/C(tele))
