Panasonic PT-VX61K Operating Instructions (Functional Manual) page 28

Projection distance
An error of ± 5% may occur to the projection distance as described.
Also, it is corrected to become smaller than the specified image size when [SCREEN ADJUSTMENT] is used.
Projection
4:3 aspect ratio
size
Minimum Maximum
Screen
distance distance
diagonal
(SD)
(LW) (LT)
0.76 (30") 0.69 1.14
1.02 (40") 0.94 1.54
1.27 (50") 1.17 1.92
1.52 (60") 1.41 2.30
1.78 (70") 1.65 2.70
2.03 (80") 1.89 3.08
2.29 (90") 2.14 3.48
2.54 (100") 2.37 3.87
3.05 (120") 2.86 4.65
3.81 (150") 3.58 5.81
5.08 (200") 4.78 7.76
6.35 (250") 5.98 9.70
7.62 (300") 7.18 11.65
Projection distance formulas
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
Screen height (SH)
Screen width (SW)
Minimum (LW)
Projection
distance (L)
Maximum (LT)
28 - ENGLISH
Chapter 2 Getting Started - Setting up
16:9 aspect ratio
Distance from
Minimum
the lens center
distance
to the image
(LW)
lower end (H)
0.046 ~ 0.228 0.75
0.061 ~ 0.306 1.02
0.076 ~ 0.381 1.28
0.091 ~ 0.456 1.54
0.107 ~ 0.534 1.81
0.122 ~ 0.609 2.06
0.137 ~ 0.687 2.33
0.152 ~ 0.762 2.59
0.183 ~ 0.915 3.11
0.229 ~ 1.143 3.90
0.305 ~ 1.524 5.21
0.381 ~ 1.905 6.52
0.457 ~ 2.286 7.82
4:3
= 0.6 × SD
= 0.8 × SD
= 0.9461 × SD - 0.0295
= 1.5324 × SD - 0.0272
Distance from
Maximum
the lens center
distance
to the image
(LT)
lower end (H)
1.24 - 0.012 ~ 0.186
1.68 - 0.017 ~ 0.250
2.09 - 0.021 ~ 0.311
2.51 - 0.025 ~ 0.372
2.94 - 0.029 ~ 0.436
3.36 - 0.033 ~ 0.497
3.80 - 0.037 ~ 0.561
4.21 - 0.041 ~ 0.622
5.07 - 0.050 ~ 0.747
6.33 - 0.062 ~ 0.933
8.45 - 0.083 ~ 1.245
10.57 - 0.104 ~ 1.556
12.70 - 0.124 ~ 1.867
16:9
= 0.490 × SD
= 0.872 × SD
= 1.0307 × SD - 0.0295
= 1.6696 × SD - 0.0272
16:10 aspect ratio
Distance from
Minimum Maximum
the lens center
distance distance
to the image
(LW) (LT)
lower end (H)
0.73 1.21 0.008 ~ 0.201
0.99 1.63 0.011 ~ 0.270
1.24 2.04 0.013 ~ 0.337
1.49 2.44 0.016 ~ 0.403
1.76 2.86 0.019 ~ 0.472
2.01 3.27 0.022 ~ 0.538
2.27 3.69 0.024 ~ 0.607
2.52 4.10 0.027 ~ 0.673
3.03 4.93 0.032 ~ 0.808
3.79 6.16 0.040 ~ 1.010
5.06 8.22 0.054 ~ 1.346
6.34 10.29 0.067 ~ 1.683
7.61 12.35 0.081 ~ 2.019
16:10
= 0.530 × SD
= 0.848 × SD
= 1.0028 × SD - 0.0295
= 1.6244 × SD - 0.0272
(Unit: m)