Appendix
Projected image size
NOTE: Visit our website for an interactive image size calculator.
Table 1: Projection sizes: Standard lens (1.5 - 2.2:1 throw ratio)
| Minimum Image | Maximum Image | ||
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| Diagonal | Image | Diagonal | Image |
Distance | Image | Width | Image | Width |
(feet/m) | (feet/m) | (feet/m) | (feet/m) | (feet/m) |
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Min Distance | 1.7/0.52 | 1.46/.42 | 2.5/0.76 | 1.82/0.55 |
3/0.9 |
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5/1.5 | 2.84/0.87 | 2.27/.69 | 4.17/1.27 | 4.55/1.39 |
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10/3.0 | 5.68/1.73 | 4,55/1.39 | 8.33/2.54 | 9.09/2.77 |
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20/6.1 | 11.36/3.46 | 9.09/2.77 | 16.67/5.08 | 13.33/4.06 |
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30/9.1 | 17.05/5.2 | 13.64/4.16 | 25.0/7.62 | 20.0/6.10 |
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40/12.2 | 22.73/6.93 | 18.18/5.54 | 33.33/10.16 | 26.67/8.13 |
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Max Distance | 25.85/7.88 | 20.68/6.20 | 37.92/11.56 | 30.33/9.25 |
45.5/13.9 |
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The image offset range for the standard lens is 10:1 (100%) to 1:1 (50%).
Table 2: Projection sizes: Short Fixed lens (0.8:1 throw ratio)
| Image Size |
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| Diagonal Image |
| Image Width |
Distance (feet/m) | (feet/m) |
| (feet/m) |
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Min Distance | 4.69/1.43 |
| 3.75/1.14 |
3/0.9 |
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5/1.5 | 7.81/2.38 |
| 6.25/1.91 |
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10/3.0 | 15.63/4.76 |
| 12.5/3.81 |
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Max Distance 12/3.7 | 18.75/5.72 |
| 15.0/4.57 |
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The optimal offset setting for the fixed focus short throw lens is 50% (on axis).
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