C PROJECTION DISTANCES
Follow the table below to determine the optimal projection distance “L” between the screen and the center of the lens (fFig 30a). This will help you to obtain the desired screen size.The manual lens shift adjustments allows the projected image to be moved vertically, up or down, in relation to the centre of the screen (Fig.30b). If the distance “H” between the centre of the screen and the centre of the lens exceed Hmax, it is necessary to tilt the projector and use the digital keystone to correct the image projected.
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( Fig.30a)
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Screen | Screen |
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size | width |
| Min projection distance |
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(diagonal) |
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| min. L |
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| H max |
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| max. L |
| H max |
in. | m | in. | m | ft. in. | m | ft. in. |
| m | ft. in. | m | ft. in. | |
50" | 1,1 | 44” | 2,0 | 6’ | 6” | 0,3 | 0’ 11” |
| 2,7 | 9’ 0” | 0,3 | 1’ 0” |
60" | 1,3 | 52” | 2,4 | 7’ | 10” | 0,3 | 1’ 1” |
| 3,3 | 10’ 9” | 0,3 | 1’ 1” |
70" | 1,6 | 61” | 2,8 | 9’ | 1” | 0,4 | 1’ 3” |
| 3,8 | 12’ 7” | 0,4 | 1’ 4” |
80" | 1,8 | 70” | 3,2 | 10’ | 5” | 0,4 | 1’ 6” |
| 4,4 | 14’ 4” | 0,5 | 1’ 8” |
90" | 2,0 | 78” | 3,6 | 11’ | 9” | 0,5 | 1’ 8” |
| 4,9 | 16’ 2” | 0,5 | 1’ 9” |
100" | 2,2 | 87” | 4,0 | 13’ | 1” | 0,6 | 1’ 10” |
| 5,5 | 17’ 11” | 0,6 | 2’ 0” |
120’ | 2,7 | 105” | 4,8 | 15’ | 8” | 0,7 | 2’ 3” |
| 6,6 | 21’ 7” | 0,7 | 2’ 4” |
150" | 3,3 | 131” | 6,0 | 19’ | 7” | 0,8 | 2’ 9” |
| 8,2 | 26’ 11” | 0,9 | 2’ 11” |
180" | 4,0 | 157” | 7,2 | 23’ | 6” | 1,0 | 3’ 4” |
| 9,9 | 32’ 4” | 1,0 | 3’ 3” |
200" | 4,4 | 174” | 8,0 | 26’ | 1” | 1,1 | 3’ 8” |
| 11,0 | 35’ 11” | 1,2 | 3’ 11” |
220" | 4,9 | 192” | 8,8 | 28’ | 9” | 1,2 | 4’ 1” |
| 12,0 | 39’ 6” | 1,3 | 4’ 3” |
250" | 5,5 | 218” | 9,9 | 32’ | 7” | 1,4 | 4’ 7” |
| 13,7 | 44’ 11” | 1,4 | 4’ 7” |
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