Official Sony VPL-HW50ES Owners Thread - Page 119 - AVS | Home Theater Discussions And Reviews
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jkasanic,

U can fix this gamma droop using Sony's Image Director software. U will also realize that if u select rec709 color space u will have undersaturated colors. U will need to use the wide color space and the in built cms to fix the colors. There is a thread in hifi.de forum talking about this gamma droop.
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post #3542 of 3543 Unread Today, 06:33 PM
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Quote:
Originally Posted by venkatesh_m View Post
jkasanic,

U can fix this gamma droop using Sony's Image Director software. U will also realize that if u select rec709 color space u will have undersaturated colors. U will need to use the wide color space and the in built cms to fix the colors. There is a thread in hifi.de forum talking about this gamma droop.
Do you have any links?
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post #3543 of 3543 Unread Today, 07:04 PM
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Quote:
Originally Posted by audiohobbit View Post
Hi there from Germany,

we are having some issues with shrinking color spaces and all colors drifting towards blue with Sony HW50 and also VW90/95 and also the gamma value goes down, even at only a few hundred hours. It seems to be an ongoing process and after a while you won't be able to even recalibrate the colors to the Rec709 colorspace, and even with gamma setting 2.6 in the menu you can't reach at least 2.2.
Some projectors also seem to lose native on/off-contrast.

Almost every HW50 that has been measured seems to have these problems. We were wondering if this is not an issue in the US or elsewhere?
I think that here at AVS there are also many users that do have calibration equipment and measure their projector from time to time?
Did you never encounter some problems?

Also Ekki Schmidt from cine4home has investigated the problem. His first guess was that the color filters degrade but the funny thing is that the native color space (well actually there isn't realy a native colorspace at the HW50 Ekki said) seem to remain and not drift towards blue. So his last guess was that it may have s.th. to do with the blue gamma and may be corrected with software.
The big problem is that the Sony Support did nothing at almost all cases and returned the projector with the statement that this would be normal wear...! (after a few hundred hours!!)
Ekki Schmidt also thinks that it has not so much to do with the amount of hours that the pj was running but with the total age of the projector.
Also it seems to have nothing to do with the lamp because Ekki tested this also with a new lamp and other users did the same with no result.

There is a big thread in german hifi-forum about that issue: http://www.hifi-forum.de/index.php?a...4&thread=13697

I can not translate everything for you, but look at the measurements that were posted.
I measured a HW50 of a friend of mine twice and could document that the problem is ongoing, look at these measurements: (I'm not sure if you can enlarge the pictures when you're not a member of hifi-forum): http://www.hifi-forum.de/index.php?a...postID=931#931
If this drift towards blue will be ongoing we won't be able to recalibrate the pj!!
jkasanic,

Pls see the quoted post here in this thread.
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