Calculation Formulas For Projection Distance By Lens Types - Panasonic PT-DW100U Operating Instructions Manual

If the projector is used with a screen size not listed in this manual, check the diagonal dimension (inch) of your
screen and calculate the projection distance using the following formulas.

Calculation formulas for projection distance by lens types

Model number of
Throw ratio
projection lens
2.0-2.7 : 1
ET-D75LE1
1.5-2.0 : 1
2.7-4.1 : 1
ET-D75LE2
2.1-3.1 : 1
4.1-6.9 : 1
ET-D75LE3
3.1-5.2 : 1
6.9-11.0 : 1
ET-D75LE4
5.2-8.2 : 1
10.9-20.6 : 1
ET-D75LE8
8.2-15.4 : 1
1.4-1.6 : 1
ET-D75LE6
1.0-1.2 : 1
ET-D75LE5
Aspect ratio
4:3
16:9
4:3
16:9
4:3
16:9
4:3
16:9
4:3
16:9
4:3
16:9
1.0 : 1 4:3
0.8 : 1 16:9
Projection distance (L) formula (Units: m)
Minimal distance : L = 0.0419 × Screen diagonal (inch) - 0.0760
Maximal distance: L = 0.0560 × Screen diagonal (inch) - 0.1004
Minimal distance : L = 0.0343 × Screen diagonal (inch) - 0.0760
Maximal distance: L = 0.0458 × Screen diagonal (inch) - 0.1004
Minimal distance : L = 0.0563 × Screen diagonal (inch) - 0.0795
Maximal distance: L = 0.0844 × Screen diagonal (inch) - 0.1064
Minimal distance : L = 0.0460 × Screen diagonal (inch) - 0.0795
Maximal distance: L = 0.0689 × Screen diagonal (inch) - 0.1064
Minimal distance : L = 0.0844 × Screen diagonal (inch) - 0.0958
Maximal distance: L = 0.1409 × Screen diagonal (inch) - 0.1216
Minimal distance : L = 0.0689 × Screen diagonal (inch) - 0.0958
Maximal distance: L = 0.1151 × Screen diagonal (inch) - 0.1216
Minimal distance : L = 0.1409 × Screen diagonal (inch) - 0.1158
Maximal distance: L = 0.2241 × Screen diagonal (inch) - 0.1013
Minimal distance : L = 0.1151 × Screen diagonal (inch) - 0.1158
Maximal distance: L = 0.1831 × Screen diagonal (inch) - 0.1013
Minimal distance : L = 0.2241 × Screen diagonal (inch) - 0.3862
Maximal distance: L = 0.4200 × Screen diagonal (inch) - 0.3598
Minimal distance : L = 0.1831 × Screen diagonal (inch) - 0.3862
Maximal distance: L = 0.3430 × Screen diagonal (inch) - 0.3598
Minimal distance : L = 0.0283 × Screen diagonal (inch) - 0.0566
Maximal distance: L = 0.0339 × Screen diagonal (inch) - 0.0736
Minimal distance : L = 0.0231 × Screen diagonal (inch) - 0.0566
Maximal distance: L = 0.0277 × Screen diagonal (inch) - 0.0736
L = 0.0216 × Screen diagonal (inch) - 0.0835
L = 0.0176 × Screen diagonal (inch) - 0.0835
ENGLISH – 23