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7
FIGURE 5
Lowest image projection angle
F
IGURE
6
Highest image projection angle
Once you know the diagonal image size, you can figure out the
width and height using these formulas:
width (inches) = diagonal (inches) x 0.8
height (inches) = width (inches) x 0.75
10’ high
image
bottom of image
5’ below lens
H
lens center
10’ high
image
bottom of image
2.5’ above lens
lens center
H