Adjusting the Screen Size and Projection Distance
Refer to the illustrations and tables below to determine the screen size and projection distance.
The values shown in the table are calculated for a full size screen
b:Distance from the lens center to the bottom of the screen (±10%) c:Distance from the lens center to the top of the screen (±10%)
ENGLISH
The screen
c | Lens center |
b
a
The screen
c | Lens center |
|
b
a
Top view
Side view
Top view
Side view
If 4:3 aspect ratio
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Screen Size [inch (m)] | a [inch (m)] |
| b | c | |
| Min. | Max. | [inch (cm)] | [inch (cm)] | |
30 (0.8) | 35 (0.9) | 42 (1.1) | 1 | (2) | 17 (44) |
40 (1.0) | 47 (1.2) | 56 (1.4) | 1 | (3) | 23 (58) |
50 (1.3) | 59 (1.5) | 71 (1.8) | 1 | (4) | 29 (73) |
60 (1.5) | 71 (1.8) | 85 (2.2) | 2 | (4) | 34 (87) |
70 (1.8) | 83 (2.1) | 100 (2.5) | 2 | (5) | 40 (102) |
80 (2.0) | 95 (2.4) | 114 (2.9) | 2 | (6) | 46 (116) |
90 (2.3) | 107 (2.7) | 129 (3.3) | 3 | (7) | 51 (131) |
100 (2.5) | 119 (3.0) | 143 (3.6) | 3 | (7) | 57 (145) |
120 (3.0) | 143 (3.6) | 172 (4.4) | 3 | (9) | 69 (174) |
150 (3.8) | 180 (4.6) | 216 (5.5) | 4 | (11) | 86 (218) |
200 (5.0) | 240 (6.1) | 288 (7.3) | 6 | (15) | 114 (290) |
250 (6.3) | 300 (7.6) | 361 (9.2) | 7 | (18) | 143 (363) |
300 (7.5) | 360 (9.2) | 433 (11.0) | 9 | (22) | 171 (435) |
If 16:9 aspect ratio
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Screen Size [inch (m)] | a [inch (m)] |
| b | c | |
| Min. | Max. | [inch (cm)] | [inch (cm)] | |
30 (0.8) | 38 (1.0) | 46 (1.2) | 2 | (4) | 16 (41) |
40 (1.0) | 51 (1.3) | 61 (1.6) | 2 | (5) | 22 (55) |
50 (1.3) | 64 (1.6) | 77 (2.0) | 3 | (6) | 27 (69) |
60 (1.5) | 77 (2.0) | 93 (2.4) | 3 | (8) | 32 (82) |
70 (1.8) | 90 (2.3) | 109 (2.8) | 4 | (9) | 38 (96) |
80 (2.0) | 104 (2.6) | 125 (3.2) | 4 (10) | 43 (110) | |
90 (2.3) | 117 (3.0) | 140 (3.6) | 5 (12) | 49 (124) | |
100 (2.5) | 130 (3.3) | 156 (4.0) | 5 (13) | 54 (137) | |
120 (3.0) | 156 (4.0) | 188 (4.8) | 6 (15) | 65 (165) | |
150 (3.8) | 196 (5.0) | 235 (6.0) | 8 (19) | 81 (206) | |
200 (5.0) | 261 (6.6) | 314 (8.0) | 10 | (26) | 108 (275) |
250 (6.3) | 327 (8.3) | 393 (10.0) | 13 | (32) | 135 (343) |
300 (7.5) | 393 (10.0) | 472 (12.0) | 15 | (39) | 162 (412) |
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