Chapter 2 Getting Started — Setting up
34 - ENGLISH
Projection distance
A ±5 % error in listed projection distances may occur.
When [GEOMETRY] is used, distance is corrected to become smaller than the specied image size.
(Unit: m)
Projected image
size
Aspect ratio 16:9 Aspect ratio 16:10 Aspect ratio 4:3
Projection distance (L)
Height
position (H)
Projection distance (L)
Height
position (H)
Projection distance (L)
Height
position (H)
Diagonal (SD) Min. (LW) Max. (LT) Min. (LW) Max. (LT) Min. (LW) Max. (LT)
1.02 (40") 1.26 2.57
-
0.10 - 0.49 1.36 2.78
-
0.11 - 0.49 1.55 3.15
-
0.13 - 0.60
1.27 (50") 1.59 3.22
-
0.13 - 0.61 1.72 3.49
-
0.14 - 0.61 1.95 3.95
-
0.16 - 0.75
1.52 (60") 1.91 3.88
-
0.16 - 0.73 2.07 4.19
-
0.17 - 0.73 2.35 4.75
-
0.19 - 0.90
1.78 (70") 2.24 4.53
-
0.18 - 0.85 2.43 4.90
-
0.20 - 0.85 2.75 5.55
-
0.22 - 1.05
2.03 (80") 2.57 5.18
-
0.21 - 0.98 2.78 5.60
-
0.23 - 0.98 3.16 6.35
-
0.26 - 1.19
2.29 (90") 2.90 5.83
-
0.24 - 1.10 3.14 6.31
-
0.25 - 1.10 3.56 7.15
-
0.29 - 1.34
2.54 (100") 3.22 6.49
-
0.26 - 1.22 3.49 7.02
-
0.28 - 1.22 3.96 7.95
-
0.32 - 1.49
3.05 (120") 3.88 7.79
-
0.31 - 1.46 4.20 8.43
-
0.34 - 1.46 4.76 9.54
-
0.38 - 1.79
3.81 (150") 4.86 9.75
-
0.39 - 1.83 5.26 10.54
-
0.42 - 1.83 5.96 11.94
-
0.48 - 2.24
5.08 (200") 6.50 13.01
-
0.52 - 2.44 7.03 14.07
-
0.57 - 2.44 7.97 15.93
-
0.64 - 2.99
6.35 (250") 8.14 16.28
-
0.65 - 3.05 8.81 17.60
-
0.71 - 3.05 9.98 19.93
-
0.80 - 3.73
7.62 (300") 9.78 19.54
-
0.78 - 3.66 10.58 21.13
-
0.85 - 3.66 11.98 23.92
-
0.96 - 4.48
Formula for calculating the projection distance
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 the value.
The unit of all the formulae is m. (Values obtained by the following calculation formulae contain a slight error.)
When calculating the value using image size designation (value in inches), multiply the value in inches by 0.0254
and substitute it into SD in the formula.
Aspect ratio 16:9 Aspect ratio 16:10 Aspect ratio 4:3
Projected image size
Height (SH)
= SD x 0.490 = SD x 0.530 = SD x 0.6
Projected image size
Width (SW)
= SD x 0.872 = SD x 0.848 = SD x 0.8
Minimum projection distance
(LW)
= 1.2906 × SD
-
0.0534 = 1.3952 × SD
-
0.0534 = 1.5795 × SD
-
0.0534
Maximum projection distance
(LT)
= 2.5693 × SD
-
0.0398 = 2.7776 × SD
-
0.0398 = 3.1444 × SD
-
0.0398
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