Projection Distance and Size
Use the figures, tables, and formulas below to determine the projection size and projection distance. (Projection sizes are approximate values for
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| projection | projection distance a (m) | height (H) | |||
Screen | As seen from above | (cm) | |||||
size | min length | max length | |||||
min length | max length | ||||||
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| (inches) | (zooming max) | (zooming min) | (zooming max) | (zooming min) | |
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| 40 | 1.6 | 1.8 | 8.7 | 8.8 | |
90° |
| 60 | 2.3 | 2.8 | 12.5 | 13.1 | |
| 80 | 3.1 | 3.7 | 16.8 | 17.3 | ||
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| 100 | 4 | 4.7 | 21.7 | 21.9 | |
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| 150 | 6 | 7.3 | 32.5 | 32.9 | |
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| 200 | 8 | 9.4 | 41.9 | 43.9 | |
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| 250 | 10 | 11.7 | 52.4 | 54.8 | |
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| 300 | 12 | 14.1 | 65 | 65.8 | |
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| projection | projection distance a (inch) | height (H) | |||
| As seen from the side | (inch) | |||||
| size | min length | max length | ||||
| min length | max length | |||||
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| (inches) | (zooming max) | (zooming min) | (zooming max) | (zooming min) | |
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| |||||
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| 40 | 63 | 71 | 3 | 3 | |
| Lens center | 60 | 91 | 110 | 5 | 5 | |
| 80 | 120 | 150 | 7 | 7 | ||
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| 100 | 160 | 190 | 9 | 9 | |
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| 150 | 240 | 290 | 13 | 13 | |
H |
| 200 | 320 | 370 | 16 | 17 | |
| 250 | 390 | 460 | 21 | 22 | ||
90° |
| 300 | 470 | 560 | 26 | 26 | |
| a | 1 inch=2.54 cm |
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Preparations
a is the distance between the lens and the screen, and corresponds to a range of 1.6m to 14.1m (63.0 inches to 560.0 inches). H is the height from the image bottom to the center of the lens.
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