AVS Special Member
Join Date: Jul 1999
Location: Santa Clara, CA USA
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I had a Draper M2500 screen, which was from a batch before the streaking problems. It sounds like they sorted out that issue.
What you are describing IS hotspotting, and you will see it with CRT FPTVs and high gain screens. I didn't notice it that much with my first FPTV with 7" CRTs, but when I got a brighter FPTV with 9" CRTs it was more pronounced, as well as some colorshifting.
But from the screen materials that I looked at the M2500 had less colorshifting and hotspotting than the other high gain screens, with the glass beaded screens being the worst, combined with the CRT FPTVs.
After a short while I got used to the slight light dropoff on the picture corners, and I only noticed the colorshifting when watching B&W movies.
Ultimately, the high gain screen was the only way I could get an adequately bright picture on a 10' wide screen without overdriving the projectors, and eventually I moved to a D-ILA FPV to support a larger 1.0 gain perforated screen. But I had been pleased with the M2500 screen while I had it.