Chapter 2 Getting Started — Setting upENGLISH - 43Projection lens Model No. Throw ratio Aspect ratio Projection distance (L) formulaMin. (LW) Max. (LT)ET-D75LE302.6 - 5.0:1 16:10 = 2.2121 x SD - 0.1131 = 4.2901 x SD - 0.17652.6 - 5.0:1 16:9 = 2.2736 x SD - 0.1131 = 4.4094 x SD - 0.17653.1 - 6.0:1 4:3 = 2.5046 x SD - 0.1131 = 4.8573 x SD - 0.1765ET-D75LE404.9 - 7.9:1 16:10 = 4.2356 x SD - 0.1577 = 6.7529 x SD - 0.16154.9 - 7.9:1 16:9 = 4.3534 x SD - 0.1577 = 6.9406 x SD - 0.16155.9 - 9.5:1 4:3 = 4.7955 x SD - 0.1577 = 7.6456 x SD - 0.1615ET-D75LE87.9 - 13.8:1 16:10 = 6.7707 x SD - 0.3862 = 12.6858 x SD - 0.35987.9 - 13.8:1 16:9 = 6.9590 x SD - 0.3862 = 13.0385 x SD - 0.35989.5 - 13.8:1 4:3 = 7.6658 x SD - 0.3862 = 14.3627 x SD - 0.3598r Fixed-focus LensProjection lens Model No. Throw ratio Aspect ratio Projection distance(L1) formulaFormula for distance between projector andscreen (A1)Min. Max.ET-D75LE900.39:1 16:10 = 0.325 x SD + 0.020 = 0.245 x SH - 0.128 = 0.339 x SH - 0.1280.39:1 16:9 = 0.334 x SD + 0.020 = 0.272 x SH - 0.128 = 0.432 x SH - 0.1280.47:1 4:3 = 0.368 x SD + 0.020 = 0.245 x SH - 0.128 = 0.339 x SH - 0.128Projection lens Model No. Throw ratio Aspect ratio Projection distance (L) formulaET-D75LE500.7:1 16:10 = 0.6505 x SD - 0.07130.7:1 16:9 = 0.6686 x SD - 0.07130.9:1 4:3 = 0.7365 x SD - 0.0713Adjusting adjustable feetInstall the projector on a flat surface so that the front of the projector is parallel to the screen surface and theprojection screen is rectangular.If the screen is tilted downward, the projection screen can be adjusted to be rectangular by adjusting the frontadjustable feet. The adjustable feet can also be used to adjust the projector to be level when it is tilted in thehorizontal direction.Adjustable feet can be extended by turning them as shown in the figure. Turning them in the opposite direction willreturn them to the original position.Maximum adjustable rangeAdjustable feet: 12 mm (15/32") eachAttentionf Be careful not to block the intake/exhaust ports with your hands or any objects when adjusting the adjustable feet while the light source ison. (x page 27)
