Epson Home Cinema 3800 - Uneven focus
I just upgraded from a 3700 to a 3800 projector and am having a problem with uneven focus. Parts of the screen are blurry while other parts are crisp. If I adjust the focus ring, the blurry parts become sharp while the sharp parts become blurry. It's basically a trade-off to get an even amount of blurriness and sharpness on the affected areas. I can get it satisfactory, but satisfactory isn't good enough for something that costs this much.
My 3700 had a slight problem with this, but not to this extent.
The projector is mounted via ceiling (front projection). I have used a level to make sure it's level. I am using the lens shift as the projector isn't perfectly centered to the screen, but I've adjusted the lens shift to get it as perfect as possible before using the quick corners to fine tune.
I returned the projector and got another one, but the replacement has the same issue. I've tried centering the lens and holding a piece of paper up to it, but also get the same uneveness after adjusting the focus for the distance. This rules out the screen or the lens shift. The projector exhibits this behavior on external HDMI sources as well as built in screens like the panel alignment and pattern. Resolutions make no difference (4k, 1080p, etc). The lens is clear of smudges, scratches and dust/dirt. If I adjust the dial near the lens to expand or retract the picture size, I still get the same results. Meaning I can make the picture as small as possible, but still get uneven focus.
Just wondering if this is normal or if Epson likely had a bad batch of defective lenses and I got unlucky twice. I called their support and they state that the focus should be even and that I should return it again.
Thoughts as to whether I should go for round 3 or just live with it? I'd hate to waste time returning it again, but would also hate to live with this if I don't have to. The crisp parts of the screen look awesome. If the hole screen had uniform focus, this would be an awe inspiring projector because the picture and brightness is wonderful. However, I have this connected to a PC and the problem is noticeable and irritating when looking at text.
Last edited by DavieGravy; 04-16-2020 at 02:07 PM.