Chapter 2 Getting
Formula to calculate projection distance per projection lens
To use a projected image size not listed in this manual, check the projected image size SD (m) and use the respective formula to calculate projection distance.
The unit of all the formulae is m. (Values obtained by the following calculation formulae contain a slight error.)
rrZoom lens
Projection lens Model No. | Throw ratio | Aspect ratio | Projection distance (L) formula | ||
Min. (LW) | Max. (LT) | ||||
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ET‑D75LE1 | 1.4 - 1.8:1 | 16:9 | = 1.2152 x SD - 0.0760 | = 1.6236 x SD - 0.1004 | |
1.8 - 2.5:1 | 4:3 | = 1.4872 x SD - 0.0760 | = 1.9870 x SD - 0.1004 | ||
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ET‑D75LE2 | 1.8 - 2.8:1 | 16:9 | = 1.6303 x SD - 0.0795 | = 2.4454 x SD - 0.1064 | |
2.5 - 3.7:1 | 4:3 | = 1.9952 x SD - 0.0795 | = 2.9928 x SD - 0.1064 | ||
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ET‑D75LE3 | 2.8 - 4.6:1 | 16:9 | = 2.4454 x SD - 0.0958 | = 4.0841 x SD - 0.1216 | |
3.7 - 6.2:1 | 4:3 | = 2.9928 x SD - 0.0958 | = 4.9983 x SD - 0.1216 | ||
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ET‑D75LE4 | 4.7 - 7.4:1 | 16:9 | = 4.0841 x SD - 0.1158 | = 6.4944 x SD - 0.1013 | |
6.2 - 9.9:1 | 4:3 | = 4.9983 x SD - 0.1158 | = 7.9481 x SD - 0.1013 | ||
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ET‑D75LE8 | 7.3 - 13.8:1 | 16:9 | = 6.4950 x SD - 0.3862 | = 12.1692 x SD - 0.3598 | |
9.8 - 18.5:1 | 4:3 | = 7.9489 x SD - 0.3862 | = 14.8932 x SD - 0.3598 | ||
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ET‑D75LE6 | 0.9 - 1.1:1 | 16:9 | = 0.8201 x SD - 0.0566 | = 0.9825 x SD - 0.0736 | |
1.2 - 1.5:1 | 4:3 | = 1.0036 x SD - 0.0566 | = 1.2024 x SD - 0.0736 | ||
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ET‑D75LE10 | 1.3 - 1.7:1 | 16:9 | = 1.1497 x SD - 0.0857 | = 1.4860 x SD - 0.1085 | |
1.7 - 2.2:1 | 4:3 | = 1.4070 x SD - 0.0857 | = 1.8186 x SD - 0.1085 | ||
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ET‑D75LE20 | 1.7 - 2.4:1 | 16:9 | = 1.4709 x SD - 0.0832 | = 2.1373 x SD - 0.1162 | |
2.2 - 3.2:1 | 4:3 | = 1.8002 x SD - 0.0832 | = 2.6157 x SD - 0.1162 | ||
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ET‑D75LE30 | 2.4 - 4.7:1 | 16:9 | = 2.1221 x SD - 0.1131 | = 4.1155 x SD - 0.1765 | |
3.2 - 6.2:1 | 4:3 | = 2.5971 x SD - 0.1131 | = 5.0367 x SD - 0.1765 | ||
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ET‑D75LE40 | 4.6 - 7.4:1 | 16:9 | = 4.0631 x SD - 0.1577 | = 6.4779 x SD - 0.1615 | |
6.2 - 9.9:1 | 4:3 | = 4.9726 x SD - 0.1577 | = 7.9279 x SD - 0.1615 | ||
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rrFixed-focus lens
Projection lens Model No. | Throw ratio | Aspect ratio | Projection distance (L) formula | |
ET‑D75LE5 | 0.7:1 | 16:9 | = 0.6258 x SD - 0.0835 | |
0.9:1 | 4:3 | = 0.7659 x SD - 0.0835 | ||
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ET‑D75LE50 | 0.7:1 | 16:9 | = 0.6240 x SD - 0.0713 | |
0.9:1 | 4:3 | = 0.7637 x SD - 0.0713 | ||
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Adjusting adjustable feet
Install the projector on a flat surface so that the front of the projector is parallel to the screen surface and the projection screen is rectangular.
If the screen is tilted downward, the projection screen can be adjusted to be rectangular by adjusting the front adjustable feet. The adjustable feet can also be used to adjust the projector to be level when it is tilted in the horizontal direction.
Extend the adjustable feet by rotating in the direction shown in the figure and retract by rotating in the opposite direction.
Adjustable range
Adjustable feet: Approx. 12 mm (15/32") each
Attention
ff Heated air is expelled from the air exhaust port while the lamp is lit. Do not touch the air exhaust port directly when adjusting the adjustable feet. (x page 29)
40 - ENGLISH