Projection Distance and Size
Use the figures, tables, and formulas below to determine the projection size and projection
distance. (Projection sizes are approximate values for full-size picture with no keystone
adjustment.)
Screen
Asseenfromabove
Asseenfromtheside
a is the distance (cm, feet) between the lens and the screen, and corresponds to a range of
1 m to 11.88m (3.28 ft. to 38.97 ft.). H is the height (cm, feet) from the image bottom to the
center of the lens.
Lens center
projection
size
(inches)
Wide Tele Offset
distance distance height (H)
(m) (feet) (m) (feet) (cm) (feet)
23.9 --- --- 1.00 3.28 5.5 0.18
30 1.15 3.77 1.28 4.19 6.9 0.23
40 1.56 5.10 1.73 5.66 9.1 0.30
60 2.37 7.77 2.62 8.60 13.7 0.45
80 3.18 10.43 3.52 11.53 18.3 0.60
100 3.98 13.07 4.41 14.46 22.9 0.75
150 5.99 19.64 6.62 21.72 34.3 1.13
200 7.97 26.15 8.82 28.93 45.7 1.50
250 9.93 32.59 10.99 36.07 57.2 1.88
300 11.88 38.97 --- --- 68.6 2.25
Placement(Continued)
minlength
a(cm)=-0.000381xprojectionsize(inches)
2
+ 4.1 x projection size (inches) - 7.8
a(feet)=-0.0000125xprojectionsize(inches)
2
+ 0.135 x projection size (inches) - 0.256
maxlength
a(cm)=-0.000365xprojectionsize(inches)
2
+ 4.52 x projection size (inches) - 7.7
a(feet)=-0.000012xprojectionsize(inches)
2
+ 0.148 x projection size (inches) - 0.253
height
H(cm)=projectionsize(inches)x0.2286
H(feet)=projectionsize(inches)x0.0075
