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
Screen As seen from above
90
As seen from the side
Lens center
H 
90
a
a (min length) = |
| projection size (inches) |
|
| 25.3807 |
| |
|
|
| |
a (max length) = | projection size (inches) |
| |
23.0947 |
| ||
|
|
| |
|
|
|
| Preparations |
projection | projection distance a (m) | height |
| |
size | min length | max length | (H) |
|
(zooming | (zooming |
| ||
(inches) | (cm) |
| ||
max) | min) |
| ||
|
|
| ||
34.67 | 1.36 | 1.50 | 7.9 |
|
40 | 1.57 | 1.73 | 9.1 |
|
60 | 2.36 | 2.60 | 13.7 |
|
80 | 3.15 | 3.46 | 18.3 |
|
100 | 3.94 | 4.33 | 22.9 |
|
150 | 5.90 | 6.49 | 34.3 |
|
200 | 7.87 | 8.65 | 45.7 |
|
250 | 9.84 | 10.82 | 57.2 |
|
254.22 | 10 | 11 | 58.1 |
|
a is the distance (m) between the lens and the screen, and corresponds to a range of 1.36 m to 11 m. H is the height from the image bottom to the center of the lens.
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