Adjusting The Projector's Zoom / Focus; Adjusting Projected Image Size - Optoma HD81 User Manual

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Adjusting the Projector's Zoom / Focus

Turn the Zoom Lever to zoom in or zoom out. To focus
the image, turn the focus ring until you see a clear image.
The projector will focus at distances from 4.9 to 39.4 feet
(1.5 to 12.0 meters) and the projection screen size from
0.775m~7.62m (30.5"~300") at 16:9 mode with mechanical
travel.
Adjusting Projection Image Size
Side View
Throw Ratio (TR)=1.85 as Wide mode
B
A=6.25°
(1920x1080)=22.47°
H'=L X tan(A)
H (1920x1080)=W (1920x1080) X 0.56
0
Display Format A
16:10 (1920x1080) 6.25
4:3 (1400x1050) 6.25
Projection Distance (M)
Max
Screen Size 16:10
(inch)
Min
Max
Screen Size 4:3
(inch)
Min
Installation
B
(1920X1080)
A
L
W (1920x1080)=L/TR
0
W (1400x1050)=W
1
H (1400x1050)=W
L W
B
(cm) (cm)
22.47 245.73 132.83
22.47 245.73 99.62
2.0 2.5 3.0
48.8 61.0 73.3
40.7 50.9 61.0
39.9 49.9 59.9
33.3 41.6 49.9
Zoom Lever
Focus Ring
Front View
W
(1400X1050)
1
W
(1920X1080)
0
D
(1920X1080)
(1920x1080) X 0.75
0
(1400x1050) X 0.75
1
H H' D
(cm) (cm) (cm)
74.72 26.90 152.40
74.72 26.90 124.53
3.5 4.0 5.0
85.5 97.7 122.1
71.2 81.4 101.7
69.8 79.8 99.8
58.2 66.5 83.1
D'
(in)
60.00
49.03
6.0
146.5
122.1
119.7
99.8
25