7. Appendix
Relationship between Screen Size and Projection distance
Screen size at 4:3 | Zoomed projection |
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aspect ratio | distance | H1 | H2 | aspect ratio | ||||||||
W x D (cm) | Max. | Min. |
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25" | 51 | x | 38 | – | 1.1 m | 33 cm | 5 cm | 23" | 51 | x | 29 | |
| (3.7') | (1.1') | (0.2') | |||||||||
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30" | 61 | x | 46 | – | 1.3 m | 39 cm | 6 cm | 28" | 61 | x | 34 | |
| (4.4') | (1.3') | (0.2') | |||||||||
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40" | 81 | x | 61 | 1.2 m | 1.8 m | 52 cm | 9 cm | 37" | 81 | x | 46 | |
(3.8') | (5.9') | (1.7') | (0.3') | |||||||||
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50" | 102 | x | 76 | 1.4 m | 2.3 m | 65 cm | 11 cm | 46" | 102 | x | 57 | |
(4.8') | (7.5') | (2.2') | (0.4') | |||||||||
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60" | 122 | x | 91 | 1.7 m | 2.7 m | 78 cm | 13 cm | 55" | 122 | x | 69 | |
(5.7') | (9.0') | (2.6') | (0.4') | |||||||||
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70" | 142 | x | 107 | 2.0 m | 3.2 m | 92 cm | 15 cm | 64" | 142 | x | 80 | |
(6.7') | (10.5') | (3.0') | (0.5') | |||||||||
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80" | 163 | x | 122 | 2.3 m | 3.6 m | 105 cm | 17 cm | 73" | 163 | x | 91 | |
(7.7') | (12.0') | (3.5') | (0.6') | |||||||||
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90" | 183 | x | 137 | 2.6 m | 4.1 m | 118 cm | 19 cm | 83" | 183 | x | 103 | |
(8.7') | (13.5') | (3.9') | (0.6') | |||||||||
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100" | 203 | x | 152 | 2.9 m | 4.6 m | 131 cm | 22 cm | 92" | 203 | x | 114 | |
(9.6') | (15.1') | (4.3') | (0.7') | |||||||||
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110" | 224 | x | 168 | 3.2 m | 5.0 m | 144 cm | 24 cm | 101" | 224 | x | 126 | |
(10.6') | (16.6') | (4.7') | (0.8') | |||||||||
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120" | 244 | x | 183 | 3.5 m | 5.5 m | 157 cm | 26 cm | 110" | 244 | x | 137 | |
(11.6') | (18.1') | (5.2') | (0.9') | |||||||||
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130" | 264 | x | 198 | 3.8 m | 5.9 m | 170 cm | 28 cm | 119" | 264 | x | 149 | |
(12.6') | (19.6') | (5.6') | (0.9') | |||||||||
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140" | 284 | x | 213 | 4.1 m | 6.4 m | 183 cm | 30 cm | 129" | 284 | x | 160 | |
(13.5') | (21.2') | (6.0') | (1.0') | |||||||||
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150" | 305 | x | 229 | 4.4 m | 6.9 m | 196 cm | 32 cm | 138" | 305 | x | 171 | |
(14.5') | (22.7') | (6.5') | (1.1') | |||||||||
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160" | 325 | x | 244 | 4.7 m | 7.3 m | 209 cm | 35 cm | 147" | 325 | x | 183 | |
(15.5') | (24.2') | (6.9') | (1.1') | |||||||||
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170" | 345 | x | 259 | 5.0 m | 7.8 m | 222 cm | 37 cm | 156" | 345 | x | 194 | |
(16.5') | (25.7') | (7.3') | (1.2') | |||||||||
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176" | 358 | x | 268 | 5.2 m | 8.1 m | 230 cm | 38 cm | 162" | 358 | x | 201 | |
(17.0') | (26.6') | (7.6') | (1.3') | |||||||||
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180" | 366 | x | 274 | 5.3 m | 8.3 m | 235 cm | 39 cm | 165" | 366 | x | 206 | |
(17.4') | (27.2') | (7.8') | (1.3') | |||||||||
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190" | 386 | x | 290 | 5.6 m | 8.7 m | 248 cm | 41 cm | 174" | 386 | x | 217 | |
(18.4') | (28.8') | (8.2') | (1.4') | |||||||||
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200" | 406 | x | 305 | 5.9 m | – | 262 cm | 43 cm | 184" | 406 | x | 229 | |
(19.4') |
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210" | 427 | x | 320 | 6.2 m | – | 275 cm | 45 cm | 193" | 427 | x | 240 | |
(20.4') |
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220" | 447 | x | 335 | 6.5 m | – | 288 cm | 48 cm | 202" | 447 | x | 251 | |
(21.3') |
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230" | 467 | x | 351 | 6.8 m | – | 301 cm | 50 cm | 211" | 467 | x | 263 | |
(22.3') |
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240" | 488 | x | 366 | 7.1 m | – | 314 cm | 52 cm | 220" | 488 | x | 274 | |
(23.3') |
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250" | 508 | x | 381 | 7.3 m | – | 327 cm | 54 cm | 229" | 508 | x | 286 | |
(24.2') |
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260" | 528 | x | 396 | 7.6 m | – | 340 cm | 56 cm | 239" | 528 | x | 297 | |
(25.2') |
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270" | 549 | x | 411 | 7.9 m | – | 353 cm | 58 cm | 248" | 549 | x | 309 | |
(26.2') |
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280" | 569 | x | 427 | 8.2 m | – | 366 cm | 61 cm | 257" | 569 | x | 320 | |
(27.2') |
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290" | 589 | x | 442 | 8.5 m | – | 379 cm | 63 cm | 266" | 589 | x | 331 | |
(28.1') |
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300" | 610 | x | 457 | 8.8 m | – | 392 cm | 65 cm | 275" | 610 | x | 343 | |
(29.1') |
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64
