Chapter 2āGetting Started ā Setting up
54 - ENGLISH
Formula for calculating the 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.)
When calculating a projection distance using image size designation (value in inches), multiply the value in inches
by 0.0254 and substitute it into SD in the formula for calculating the projection distance.
r Zoom Lens
Projection lens Model No. Throw ratio Aspect ratio
Projection distance (L) formula
Min. (LW) Max. (LT)
ET-D3LEW200
0.645 - 0.850:1 16:10 = 0.5665 x SD
-
0.1001 = 0.7425 x SD
-
0.1076
0.646 - 0.851:1 16:9 = 0.5823 x SD
-
0.1001 = 0.7632 x SD
-
0.1076
0.778 - 1.02:1 4:3 = 0.6414 x SD
-
0.1001 = 0.8406 x SD
-
0.1076
ET-D3LEW60/
ET-D75LE6
0.924 - 1.10:1 16:10 = 0.7979 x SD
-
0.0566 = 0.9559 x SD
-
0.0736
0.924 - 1.10:1 16:9 = 0.8201 x SD
-
0.0566 = 0.9825 x SD
-
0.0736
1.12 - 1.32:1 4:3 = 0.9032 x SD
-
0.0566 = 1.0822 x SD
-
0.0736
ET-D3LEW10
1.26 - 1.72:1 16:10 = 1.0886 x SD
-
0.0867 = 1.4876 x SD
-
0.1025
1.26 - 1.72:1 16:9 = 1.1188 x SD
-
0.0867 = 1.5290 x SD
-
0.1025
1.52 - 2.07:1 4:3 = 1.2324 x SD
-
0.0867 = 1.6841 x SD
-
0.1025
ET-D75LE10
1.30 - 1.67:1 16:10 = 1.1186 x SD
-
0.0857 = 1.4458 x SD
-
0.1085
1.30 - 1.67:1 16:9 = 1.1497 x SD
-
0.0857 = 1.4860 x SD
-
0.1085
1.56 - 2.01:1 4:3 = 1.2663 x SD
-
0.0857 = 1.6367 x SD
-
0.1085
ET-D3LES20/
ET-D75LE20
1.67 - 2.41:1 16:10 = 1.4312 x SD
-
0.0832 = 2.0795 x SD
-
0.1162
1.67 - 2.41:1 16:9 = 1.4709 x SD
-
0.0832 = 2.1373 x SD
-
0.1162
2.00 - 2.90:1 4:3 = 1.6202 x SD
-
0.0832 = 2.3542 x SD
-
0.1162
ET-D3LET30
2.40 - 4.66:1 16:10 = 2.0609 x SD
-
0.1261 = 4.0084 x SD
-
0.1892
2.40 - 4.66:1 16:9 = 2.1182 x SD
-
0.1261 = 4.1198 x SD
-
0.1892
2.88 - 5.61:1 4:3 = 2.3331 x SD
-
0.1261 = 4.5378 x SD
-
0.1892
ET-D75LE30
2.40 - 4.66:1 16:10 = 2.0647 x SD
-
0.1131 = 4.0041 x SD
-
0.1765
2.41 - 4.66:1 16:9 = 2.1221 x SD
-
0.1131 = 4.1155 x SD
-
0.1765
2.89 - 5.60:1 4:3 = 2.3374 x SD
-
0.1131 = 4.5330 x SD
-
0.1765
ET-D3LET40
4.61 - 7.41:1 16:10 = 3.9505 x SD
-
0.1673 = 6.3330 x SD
-
0.1846
4.61 - 7.41:1 16:9 = 4.0601 x SD
-
0.1673 = 6.5091 x SD
-
0.1846
5.54 - 8.90:1 4:3 = 4.4720 x SD
-
0.1673 = 7.1694 x SD
-
0.1846
ET-D75LE40
4.62 - 7.38:1 16:10 = 3.9532 x SD
-
0.1577 = 6.3027 x SD
-
0.1615
4.62 - 7.38:1 16:9 = 4.0631 x SD
-
0.1577 = 6.4779 x SD
-
0.1615
5.55 - 8.86:1 4:3 = 4.4754 x SD
-
0.1577 = 7.1351 x SD
-
0.1615
ET-D3LET80/
ET-D75LE8
7.34 - 13.8:1 16:10 = 6.3193 x SD
-
0.3862 = 11.8400 x SD
-
0.3598
7.34 - 13.8:1 16:9 = 6.4950 x SD
-
0.3862 = 12.1692 x SD
-
0.3598
8.82 - 16.6:1 4:3 = 7.1540 x SD
-
0.3862 = 13.4039 x SD
-
0.3598
r Fixed-focus Lens
Projection lens Model No. Throw ratio Aspect ratio Projection distance (L) formula
ET-D3LEU100
0.370:1 16:10 = 0.3264 x SD
-
0.0664
0.370:1 16:9 = 0.3355 x SD
-
0.0664
0.446:1 4:3 = 0.3695 x SD
-
0.0664
ET-D3LEW50/
ET-D75LE50
0.694:1 16:10 = 0.6072 x SD
-
0.0713
0.695:1 16:9 = 0.6240 x SD
-
0.0713
0.836:1 4:3 = 0.6873 x SD
-
0.0713
Projection lens Model No. Throw ratio Aspect ratio
Projection distance
(L1) formula
Distance (A1) formula from the projector to
the screen
Min. Max.
ET-D75LE95
0.364:1 16:10 = 0.303 x SD + 0.020 = 0.184 x SH
-
0.128 = 0.283 x SH
-
0.128
0.364:1 16:9 = 0.312 x SD + 0.020 = 0.205 x SH
-
0.128 = 0.370 x SH
-
0.128
0.436:1 4:3 = 0.343 x SD + 0.020 = 0.184 x SH
-
0.128 = 0.283 x SH
-
0.128
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