hey im pretty new to this forum but i got a good start on my projector.

i have a 400w ballast and bulbs
i have a standard projection lens from LL
and built a case
17" widescreen 1280x768 stripped lcd

i want a 110" diaganal screen, so which fresnals should i use either pro or 3d lens and what focal lenghs...
and in the focalcalculator which fresnel goes in the fresnal value???
thanks

You will need a 220mm and 330mm fresnel from 3dlens.com. You can use either the .2mm pitch, 320x400mm fresnels or the .5mm pitch, 395x395mm fresnels. Your panel is approx 368mm wide so both with cover it. the .5mm pitch fressys will give you a slightly brighter image while the .2 mm versions will give you a slightly sharper image. Don't know if anyone has done any direct experiment with this, but it should hold true. LL fresnels are .5mm.

great thanks for the reply... which fresnel is closer to the projection lens???


and what blade should i cut fresnels with or should i cut them at all
thx