Appendix F : Lenses
Lens formulas to calculate the projector distance.
SD(1.15:1) | Metric | PD= 1.079 x SW + 0.2929 |
| Inch | PD= 1.079 x SW + 11.53 |
SD(1.2:1) | Metric | PD= 1.135 x SW + 0.334 |
| Inch | PD= 1.135 x SW +13.15 |
SD(1.7:1) | Metric | PD= 1.4304 x SW + 0.4908 |
| Inch | PD= 1.4304 x SW + 19.32 |
QSD(0.8:1) | Metric | PD= 0.713 x SW + 0.2881 - (0.00328 / SW) |
| Inch | PD= 0.713 x SW + 11.34 - (5.084 / SW) |
QSD(1.2:1) | Metric | PD= 1.1633 x SW + 0.2543 - (0.0875 / SW) |
| Inch | PD= 1.1633 x SW + 10 - (3.58 / SW) |
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