■LCD Projector /Screen Relative Position Chart
The picture can be adjusted to the desired size within the range of the zoom lens. (The values in the table are reference values.)
Screen type (4:3) |
| Throw distance (L) | Height | |||
Screen | Width |
| Height | Wide | Telephoto | position |
size | (SW) |
| (SH) | (LW) | (LT) | (H1) |
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30 in | 0.61 m |
| 0.46 m |
| 1.6 m | 6.5 cm |
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40 in | 0.81 m |
| 0.61 m | 1.6 m | 2.1 m | 8.7 cm |
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60 in | 1.22 m |
| 0.91 m | 2.4 m | 3.1 m | 13.1 cm |
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80 in | 1.63 m |
| 1.22 m | 3.2 m | 4.2 m | 17.4 cm |
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100 in | 2.03 m |
| 1.52 m | 4.0 m | 5.2 m | 21.8 cm |
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150 in | 3.05 m |
| 2.29 m | 6.0 m | 7.8 m | 32.7 cm |
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200 in | 4.06 m |
| 3.05 m | 8.1 m | 10.5 m | 43.5 cm |
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250 in | 5.08 m |
| 3.81 m | 10.1 m | 13.1 m | 54.4 cm |
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300 in | 6.10 m |
| 4.57 m | 12.1 m | 15.7 m | 65.3 cm |
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If the screen size is SD, then the following formula is first used to obtain the screen width (SW).
SW (m) = SD x 0.0254 
5 x 4
The value for SW obtained above can then be used with the following functions to calculate the projection distance.
LW (m) = 1.98 x SW
LT (m) = 2.57 x SW
For 16:9 aspect ratios, the following formula can be used to calculate the screen width (SW) and the projection distance for the wide lens position.
SW (m) = SD x 0.0254 
18.36 x 16
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