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129
APPENDIX
Relationship between Screen Size and Projecting Distance
Screen size at 4:3
aspect ratio
Type – W x D (cm)
Projecting distance at (m)
H1 (cm) H2 (cm)
Screen size at 16:9
aspect ratio
Type – W x D (cm)
Max. zooming Min. zooming
40" 81 x 61 1.2 (3.9') 2.0 (6.6') 55 (1.8') 6 (0.2') 37" 81 x 46
50" 102 x 76 1.5 (4.9') 2.5 (8.2') 69 (2.3') 8 (0.26') 46" 102 x 57
60" 122 x 91 1.8 (5.9') 2.9 (9.6') 82 (2.7') 9 (0.3') 55" 122 x 69
70" 142 x 107 2.1 (6.9') 3.4 (11.2') 96 (3.1') 11 (0.36') 64" 142 x 80
80" 163 x 122 2.4 (7.9') 3.9 (12.9') 110 (3.6') 12 (0.4') 74" 163 x 91
90" 183 x 137 2.7 (8.9') 4.4 (14.6') 123 (4.0') 14 (0.46') 83" 183 x 103
100" 203 x 152 3.0 (9.8') 4.9 (16.1') 137 (4.5') 15 (0.49') 91" 203 x 114
110" 224 x 168 3.3 (10.8') 5.4 (17.7') 151 (5.0') 17 (0.5') 101" 224 x 126
120" 244 x 183 3.6 (11.8') 5.9 (19.4') 165 (5.4') 18 (0.59') 110" 244 x 137
130" 264 x 198 3.9 (12.8') 6.4 (21') 178 (5.8') 20 (0.66') 119" 264 x 149
140" 284 x 213 4.2 (13.8') 6.9 (22.6') 192 (6.3') 21 (0.69') 128" 284 x 160
150" 305 x 229 4.5 (14.8') 7.4 (24.2') 206 (6.8') 23 (0.75') 138" 305 x 171
160" 325 x 244 4.8 (15.5') 7.9 (25.9') 219 (7.2') 24 (0.79') 147" 325 x 183
170" 345 x 259 5.1 (16.8') 8.4 (27.4') 233 (7.6') 26 (0.85') 156" 345 x 194
180" 366 x 274 5.4 (17.7') 8.9 (29.2') 247 (8.1') 27 (0.86') 165" 366 x 206
182" 370 x 277 5.4 (17.7') 9.0 (29.5') 250 (8.2') 28 (0.9') 167" 370 x 208
190" 386 x 290 5.6 (18.4') – 261 (8.6') 29 (0.95') 174" 386 x 217
200" 406 x 305 5.9 (19.4') – 274 (9.0') 30 (0.98') 184" 406 x 229
210" 427 x 320 6.2 (20.3') – 288 (9.4') 32 (1.05') 193" 427 x 240
220" 447 x 335 6.5 (21.3') – 302 (9.9') 34 (1.12') 202" 447 x 251
230" 467 x 351 6.8 (22.3') – 315 (10.3') 35 (1.15') 211" 467 x 263
240" 488 x 366 7.1 (23.3') – 329 (10.8') 37 (1.21') 220" 488 x 274
250" 508 x 381 7.4 (24.3') – 343 (11.3') 38 (1.25') 233" 508 x 286
260" 528 x 396 7.7 (25.3') – 357 (11.7') 40 (1.31') 239" 528 x 297
270" 549 x 411 8.0 (26.3') – 370 (12.1') 41 (1.35') 248" 549 x 309
280" 569 x 427 8.3 (27.2') – 384 (12.6') 43 (1.41') 257" 569 x 320
290" 589 x 442 8.6 (28.2') – 398 (13.1') 44 (1.44') 266" 589 x 331
300" 610 x 457 8.9 (29.2') – 411 (13.5') 46 (1.51') 276" 610 x 343
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