Originally Posted by mark haflich
A bunch of things I would suggest. Shut off the RC and report if this has any affect on the color shading in the corners. It is possible that the lens shift is causing CA which is showing about a changes in the color at the extremities towards the shift. Do you see the bright white area in the middle that shows up in the photos. This appears to be hot spotting which should not occur at your throw of 15 ft with a screen gain multiplier of 1.3 with your screen width. You have the projector too high above the top of the screen. Could you lower it about 3 inches? My 1100 is uniform white plus no hot spotting on my 1.0 gain screen.
Mark, thanks a bunch!
1. Turning the RC off has no effect on the yellow corners / bottom.
2. I shifted up the image by half a screen, so that the lens is right in the middle, and the yellow corners stayed the same. They just moved up with the picture. (Ignore the purple / green artifacts in the photos - they are due to the iPhone and are not visible on the screen.)
3. The hot spot is because I had to take the photo with my iPhone from 6-7 feet away from the screen to fill up the frame. It also appears worse due to the darker bottom corners. The hot spot is much less visible from the 12 feet viewing position (and there are a few sparkles at that location - this does not bother me).
4. I have the PSS-H10 support attached to the reinforced concrete slab and could not lower it further (see photo).
5. My previous projector, a VPL-VW60 - Black Pearl - did not exhibit darker corners at the bottom (on the same screen and from the same mounting position). The colour uniformity was excellent.
6. Please also see my earlier response to Craig. I unmounted the projector, placed it on a table in an upright position, centred to the screen, and the darker corners were still there, but now at the top, as the projector was rotated.
I am strongly considering to upgrade to the 1100ES, if Sony Canada would allow this. Hopefully, the double price would also mean a much better PJ, with less colour uniformity issues.
Any other ideas? Much appreciated.