Optoma HD-3000 User Manual page 24

When using a normal screen (4:3) project the image to the full horizontal width of the 4:3 screen.
Screen Size (4:3)
Diagonal Width
250" (635 cm) 200" (508 cm) 150" (381 cm)
200" (508 cm) 160" (406 cm) 120" (305 cm) 22'11" (7.0 m)
150" (381 cm) 120" (305 cm)
133" (338 cm) 106" (270 cm)
106" (269 cm) 85" (215 cm)
100" (254 cm) 80" (203 cm)
92" (234 cm) 74" (187 cm)
84" (213 cm) 67" (171 cm)
72" (183 cm) 58" (146 cm)
60" (152 cm) 48" (122 cm)
40" (102 cm) 32" (81 cm)
The formula for screen size and projection distance
y1 (Max.) = 0.03466592x
y2 (Min.) = 0.0276352x
z1 (Upper) = 0
z2 (Lower) = 1.143x
Notes
• There is a tolerance of ±3% in the formula above.
• Values with a minus (–) sign indicate the distance of the lens center below
the bottom of the image.
24
4
: Screen area
: Picture area
Projection Distance
Height Max
28'8" (8.7 m)
90" (229 cm) 17'2" (5.2 m)
80" (203 cm) 15'3" (4.6 m)
64" (162 cm) 12'2" (3.7 m)
60" (152 cm) 11'6" (3.5 m)
55" (140 cm) 10'7" (3.2 m)
50" (128cm) 9'8" (2.9 m)
43" (110 cm) 8'3" (2.5 m)
36" (91 cm) 6'11" (2.1 m)
24" (61 cm) 4'7" (1.4 m)
x: Screen size (diag.) (meter)
y: Projection distance (feet)
z: Distance from the lens center to the lower
edge of the image (centimeter)
3
Distance from lens center to
the lower edge of the image
Min upper
22'10" (7.0 m) 0" (0 cm)
18'3" (5.6 m) 0" (0 cm)
13'8" (4.2 m) 0" (0 cm)
12'2" (3.7 m) 0" (0 cm)
9'8" (3.0 m) 0" (0 cm)
9'2" (2.8 m) 0" (0 cm)
8'5" (2.6 m) 0" (0 cm)
7'8" (2.3 m) 0" (0 cm)
6'7" (2.0 m) 0" (0 cm)
5'6" (1.7 m) 0" (0 cm)
3'8" (1.1 m) 0" (0 cm)
lower
-9'5" (-286 cm)
-7'6" (-229 cm)
-5'8" (-171 cm)
-5'0" (-152 cm)
-4'0" (-121 cm)
-3'9" (-114 cm)
-3'5" (-105 cm)
-3'2" (-96 cm)
-2'8" (-82 cm)
-2'3" (-69 cm)
-1'6" (-46 cm)