Originally Posted by DTGallagher
I have over the past few weeks considered replacing my old Stewart Firehawk with a Dalite High Power since the 3D picture from my Sony VPL-VW95 seems so dim.
However I ran the calculations of both screens using the Simple 3D Projection Calc spreadsheet - and it appears the brightness using the Stewart (1.3 gain but maintaining
60% of polarization based upon information provided in the first posting) is actually greater than that of the Dalite. I'm claiming 1.9 gain for the Dalite since the projector placement is less
than optimum for the screen. Using "0" for the percent of polarization maintained for the Dalite gives me a brightness rating of 10.6 fL compared to 11.6 for the Stewart.
Anyone care to comment or confirm?
Interesting, I was thinking about using the same High Power and for the same reasons. I have my PJ in the same relative position as you have and the calculator shows the same gain
in my front main seat as you have calculated.
I have tested the Da-Lite 2.4 ( samples) against my Screen Innovations Solar 4K 1.37 gain white screen and it does show a reasonable amount of gain in the best seats, the wider seats
only 25 degrees off axis are about the same gain as my fixed screen which is 1.37. My Solar 4K does not maintain polarization so there is no benefit . If you do not intend to drop your PJ
and the Stewart will give an equivalent brightness due to the polarization retention then it would be wise to stick with the Stewart . The new FireHawk is only 1.1 gain BTW are you referering
to that one or your older original screen?
The Stewart is expensive I would never buy that unless they gave you samples to test. Good luck with that as they refused to send samples to me. Apparently, they do not believe in this philosophy
and will only sell a screen based on their suggestions. Hmmmm, ever other manufacturer sent me samples and I'm glad then did as MANY are not even close to what they advertise. The Da-Lite
high power was everything they advertised btw, one of the few. And in case you do go for the Da-Lite, I can tell you the Elune Visions 2.4 is the exact same material and does work the exact same
The Stewart products intrigued me but without samples, I don't think so, not at the prices they are asking. Instead, I'm going to make a Torus screen from Sintra and paint with Silver Fire. This will give
a much better picture that any of the manufactures and it should be done including the paint gun for under $1000, well under in fact, maybe two screens