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APPENDIX
Relationship between Screen Size
and Projection Distance
Zoomed projection distance
Screen size at 4:3
aspect ratio
W x D (cm)
Max. Min.
H1 H2
Screen size at 16:9
aspect ratio
W x D (cm)
40
s
81 x 61
2.0 m
(6.6
c
)
1.2 m
(3.9
c
)
55 cm
(1.8
c
)
6 cm
(0.2
c
)
37
s
81 x 46
2.5 m
(8.2
c
)
1.5 m
(4.9
c
)
69 cm
(2.3
c
)
8 cm
(0.26
c
)
46
s
102 x 57
60
s
122 x 91
3.0 m
(9.8
c
)
1.8 m
(5.9
c
)
82 cm
(2.7
c
)
9 cm
(0.3
c
)
55
s
122 x 69
3.5 m
(11.5
c
)
2.1 m
(6.9
c
)
96 cm
(3.1
c
)
11 cm
(0.36
c
)
64
s
142 x 80
4.0 m
(13.1
c
)
2.4 m
(7.9
c
)
110 cm
(3.6
c
)
12 cm
(0.4
c
)
74
s
163 x 91
4.5 m
(14.8
c
)
2.7 m
(8.9
c
)
123 cm
(4.0
c
)
14 cm
(0.46c)
83
s
183 x 103
5.0 m
(16.4
c
)
3.0 m
(9.8
c
)
137 cm
(4.5
c
)
15 cm
(0.49
c
)
91
s
203 x 114
5.5 m
(18.0
c
)
3.3 m
(10.8
c
)
151 cm
(5.0
c
)
17 cm
(0.56
c
)
101
s
224 x 126
6.0 m
(19.7
c
)
3.6 m
(11.8
c
)
165 cm
(5.4
c
)
18 cm
(0.59
c
)
110
s
244 x 137
6.5 m
(21.3
c
)
3.9 m
(12.8
c
)
178 cm
(5.8
c
)
20 cm
(0.66
c
)
119
s
264 x 149
7.0 m
(23.0
c
)
4.2 m
(13.8
c
)
192 cm
(6.3
c
)
21 cm
(0.69
c
)
128
s
284 x 160
7.5 m
(24.6
c
)
4.5 m
(14.8
c
)
206 cm
(6.8
c
)
23 cm
(0.75
c
)
138
s
305 x 171
8.0 m
(26.2
c
)
4.8 m
(15.7
c
)
219 cm
(7.2
c
)
24 cm
(0.79
c
)
147
s
325 x 183
8.5 m
(27.9
c
)
5.1 m
(16.7
c
)
233 cm
(7.6
c
)
26 cm
(0.85
c
)
156
s
345 x 194
8.8 m
(28.9
c
)
5.3 m
(17.4
c
)
241 cm
(7.9
c
)
27 cm
(0.86
c
)
162
s
358 x 201
9.0 m
(29.5
c
)
5.4 m
(17.7
c
)
247 cm
(8.1
c
)
27 cm
(0.86
c
)
165
s
366 x 206
9.1 m
(29.9
c
)
5.5 m
(18.0
c
)
250 cm
(8.2
c
)
28 cm
(0.9
c
)
167
s
370 x 208
-
5.7 m
(18.7
c
)
261 cm
(8.6
c
)
29 cm
(
0.95
c
)
174
s
386 x 217
-
6.0 m
(19.7
c
)
274 cm
(9.0
c
)
30 cm
(
0.98
c
)
184
s
406 x 229
-
6.3 m
(20.7
c
)
288 cm
(9.4
c
)
32 cm
(
1.05
c
)
193
s
427 x 240
-
6.6 m
(21.7
c
)
302 cm
(9.9
c
)
34 cm
(
1.12
c
)
202
s
447 x 251
-
7.0 m
(23.0
c
)
315 cm
(10.3
c
)
35 cm
(
1.15
c
)
211
s
467 x 263
-
7.3 m
(24.0
c
)
329 cm
(10.8
c
)
37 cm
(
1.21
c
)
220
s
488 x 274
-
7.6 m
(24.9
c
)
343 cm
(11.3
c
)
38 cm
(
1.25
c
)
233
s
508 x 286
-
7.9 m
(25.9
c
)
357 cm
(11.7
c
)
40 cm
(
1.31
c
)
239
s
528 x 297
-
8.2 m
(26.9
c
)
370 cm
(12.1
c
)
41 cm
(
1.35
c
)
248
s
549 x 309
-
8.5 m
(27.9
c
)
384 cm
(12.6
c
)
43 cm
(
1.41
c
)
257
s
569 x 320
-
8.8 m
(28.9
c
)
398 cm
(13.1
c
)
44 cm
(
1.44
c
)
266
s
589 x 331
-
9.1 m
(29.9
c
)
411 cm
(13.5
c
)
46 cm
(
1.51
c
)
276
s
610 x 343
50
s
102 x 76
70
s
142 x 107
80
s
163 x 122
90
s
183 x 137
100
s
203 x 152
110
s
224 x 168
120
s
244 x 183
130
s
264 x 198
140
s
284 x 213
150
s
305 x 229
160
s
325 x 244
170
s
345 x 259
176
s
358 x 268
180
s
366 x 274
182
s
370 x 277
190
s
386 x 290
200
s
406 x 305
210
s
427 x 320
220
s
447 x 335
230
s
467 x 351
240
s
488 x 366
250
s
508 x 381
260
s
528 x 396
270
s
549 x 411
280
s
569 x 427
290
s
589 x 442
300
s
610 x 457