Panasonic PTD7500U PTD7500U User Guide - Page 23
Calculation formulas for projection distance by lens types for PT-D7600U, ET-D75LE2SC - pt d7500u manual
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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 (for PT-D7500U) Model number of projection lens Aspect ratio Projection distance (L) formula Units: m ET-D75LE1 ET-D75LE1SC (1.87-2.5 :1) 4:3 Minimal distance: L=0.0412 x Screen diagonal (inch) - 0.0760 Maximal distance: L=0.0549 x Screen diagonal (inch) - 0.1003 16:9 Minimal distance: L=0.0443 x Screen diagonal (inch) - 0.0759 Maximal distance: L=0.0598 x Screen diagonal (inch) - 0.1002 Zoom lens ET-D75LE2 ET-D75LE2SC (2.5-3.75 :1) ET-D75LE3 ET-D75LE3SC (3.75-6.25 :1) 4:3 Minimal distance: L=0.0552 x Screen diagonal (inch) - 0.0795 Maximal distance: L=0.0826 x Screen diagonal (inch) - 0.1061 16:9 Minimal distance: L=0.0601 x Screen diagonal (inch) - 0.0794 Maximal distance: L=0.0899 x Screen diagonal (inch) - 0.1060 4:3 Minimal distance: L=0.0833 x Screen diagonal (inch) - 0.0963 Maximal distance: L=0.137 x Screen diagonal (inch) - 0.1203 16:9 Minimal distance: L=0.090 x Screen diagonal (inch) - 0.0963 Maximal distance: L=0.0149 x Screen diagonal (inch) - 0.1023 ET-D75LE4 ET-D75LE4SC (6.25-10.0 :1) 4:3 Minimal distance: L=0.137 x Screen diagonal (inch) - 0.1146 Maximal distance: L=0.2222 x Screen diagonal (inch) - 0.1023 16:9 Minimal distance: L=0.1491 x Screen diagonal (inch) - 0.1145 Maximal distance: L=0.2418 x Screen diagonal (inch) - 0.1022 Fixedfocus lens ET-D75LE5 (1.0 :1) 4:3 L= 0.0212 x Screen diagonal (inch) - 0.0836 16:9 L= 0.0231 x Screen diagonal (inch) - 0.0836 Calculation formulas for projection distance by lens types (for PT-D7600U) Model number of projection lens Aspect ratio Projection distance (L) formula Units: m ET-D75LE1 ET-D75LE1SC (1.5-2.0 : 1) 5:4 Minimal distance: L=0.0321 x Screen diagonal (inch) - 0.0761 Maximal distance: L=0.0427 x Screen diagonal (inch) - 0.1003 16:9 Minimal distance: L=0.0352 x Screen diagonal (inch) - 0.0761 Maximal distance: L=0.0469 x Screen diagonal (inch) - 0.1002 Zoom lens ET-D75LE2 ET-D75LE2SC (2.0-3.0: 1) ET-D75LE3 ET-D75LE3SC (3.0-5.0: 1) 5:4 Minimal distance: L=0.0429 x Screen diagonal (inch) - 0.0794 Maximal distance: L=0.0645 x Screen diagonal (inch) - 0.1065 16:9 Minimal distance: L=0.0472 x Screen diagonal (inch) - 0.0793 Maximal distance: L=0.0709 x Screen diagonal (inch) - 0.1065 5:4 Minimal distance: L=0.0645 x Screen diagonal (inch) - 0.0959 Maximal distance: L=0.1075 x Screen diagonal (inch) - 0.1214 16:9 Minimal distance: L=0.7095 x Screen diagonal (inch) - 0.0958 Maximal distance: L=0.1075 x Screen diagonal (inch) - 0.1214 ET-D75LE4 ET-D75LE4SC (5.0-8.0: 1) 5:4 Minimal distance: L=0.1177 x Screen diagonal (inch) - 0.1156 Maximal distance: L=0.1724 x Screen diagonal (inch) - 0.102 16:9 Minimal distance: L=0.1182 x Screen diagonal (inch) - 0.115 Maximal distance: L=0.1892 x Screen diagonal (inch) - 0.102 Fixedfocus lens ET-D75LE5 (0.8 : 1) 5:4 L= 0.0162 x Screen diagonal (inch) - 0.0032 16:9 L= 0.0212 x Screen diagonal (inch) - 0.0318 23