Appendix F : Lenses
Lens formulas to calculate the projector distance.
HD(1.2:1) | Metric | PD=1.264 x SW + 0.126 + (0.018/SW) |
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| Inch | PD= 1.264 x SW + 4.961 + (27.90/SW) |
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HD(2.2:1) | Metric | PD=2.0566 x SW + 0.16 + (0.029/SW) |
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| Inch | PD=2.0566 x SW + 6.299 + (44.95/SW) |
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HD(3.3:1) | Metric | PD=3.33 x SW + 0.386 + (0.046/SW) |
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| Inch | PD=3.33 x SW + 15.19 + (71.30/SW) |
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HD(4.0:1) | Metric | PD=4.02 x SW + 0.50 + (0.06/SW) |
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| Inch | PD=4.02 x SW + 19.69 + (93/SW) |
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HD(5:1)Metric | PD=5 x SW + 0.747 + (0.070/SW) |
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| Inch | PD=5 x SW + 29.41 + (108.5/SW) |
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HD(7:1)Metric | PD=6.911 x SW + 1.414 + (0.096/SW) |
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| Inch | PD=6.911 x SW + 56.06 + (148.8/SW) |
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Metric | PDmin=1.49 x SW + 0.123 |
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| PDmax=2.983 x SW + 0.145 |
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| Inch | PDmin=1.49 x SW + 4.84 |
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| PDmax=2.983 x SW + 5.71 |
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Metric | PDmin=3.126 x SW - 1.08 ± 0.2 |
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| PDmax=5.345 x SW ± 0.2 |
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| Inch | PDmin=3.126 x SW - 42.52 ± 8 |
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| PDmax=5.345 x SW ± 8 |
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HD(0.9:1)* | Metric | PD=0.83 x SW + 0.20 | recommanded screen width range | 1.2 m < SW < 3.20m |
| Inch | PD=0.83 x SW + 7.874 |
| 47 inch < SW < 126 inch |
| 5975288 BARCOGRAPHICS 8200 110497 | |
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