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Calculation formulas for projection distance by lens types (for PT-DW7000U)
ET-D75LE5
(0.8:1)
Model number of projection lens
Aspect ratio
Projection distance (L) formula Units: m
L= 0.0176 x Screen diagonal (inch) – 0.0835
ET-D75LE1
(1.5–2.0 :1)
Minimal distance: L=0.0343 x Screen diagonal (inch) – 0.0760
Maximal distance: L=0.0458 x Screen diagonal (inch) – 0.1004
16:9
ET-D75LE2
(2.0–3.0 :1)
16:9
Minimal distance: L=0.0460 x Screen diagonal (inch) – 0.0795
Maximal distance: L=0.0689 x Screen diagonal (inch) – 0.1064
Minimal distance: L=0.0689 x Screen diagonal (inch) – 0.0958
Maximal distance: L=0.1151 x Screen diagonal (inch) – 0.1216
16:9
ET-D75LE3
(3.0–5.0 :1)
Minimal distance: L=0.1151 x Screen diagonal (inch) – 0.1158
Maximal distance: L=0.1831 x Screen diagonal (inch) – 0.1013
16:9
ET-D75LE4
(5.0–8.0 :1)
Minimal distance: L=0.1831 x Screen diagonal (inch) – 0.3862
Maximal distance: L=0.3430 x Screen diagonal (inch) – 0.3598
16:9
ET-D75LE8
(8.0–15.0 :1)
16:9
Zoom
lens
Fixed-
focus
lens