I am about to place an order for a Stewart screen for use with a Sony 3D projector (95ES which I received recently), and was planning on either the StudioTek 130 or the Firehawk G3, with a bias towards the latter b/c of the polarization retention that has been mentioned here. Screen size will be on the large side -- 12'/144". It's not in a dedicated room, but ambient light can be easily eliminated, and wall colors will be changed to mid to dark tones with matte finish to minimize reflection as best possible.
So two things I've read in this thread that clarification would be helpful on: (a) the Sony would benefit from a screen like the FH G3 which has been tested here for high polarization retention (i.e., Sony is a LCoS "active" 3D projector, but some mention above that the 90ES was circular polarized?), and (b) confirmation that FH is typically high polarization.
On (b), I spoke to an engineer at Stewart today, and I asked about their formulations and if they've changed it this year (per comments early in thread), and his comment was that they change it all the time, due in large part to the change in seasons/temperatures (i.e., in winter they use one formula, and in summer they use a different formula based upon how they each react with the vinyl in different climates). hmmm.... I asked if the different formulations create different properties, and he was not able to disclose, but that it can make a difference. I asked if it would affect polarization, and he couldn't comment. I asked if the Firehawk LS material was better than the Firehawk GS, also not in a position to comment. So.... I may ask to get samples of ST130, FHG3 and FHLS and just test them to see how they do... hate to lose the time, but probably a good investment.
As a side note, I assume the Silver 5D is not a preferred material for this application given it's "active" and that 2D performance is a high priority (most of our watching)?
Thanks for any thoughts.