Hometheatermag's Panasonic 2010 black levels progress report (Good news!) - Page 2 - AVS Forum
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post #31 of 43 Old 09-04-2010, 04:15 AM
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I was never any good at math, so, :P
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post #32 of 43 Old 09-04-2010, 09:38 AM
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Quote:
Originally Posted by digitalw View Post

Yeah, but i've seen someone post is as .008 and some 0.08, so i thought it meant the same, i'm not an expert on numbers :P

Either way, the PG10 does not have 5 times better black level than the PK950 (or the pk550 for that matter).

Again, not be picayune (I do mean this)... and nothing personal but that is not what L7R posted. The post read that to his eyes the G10 had blacks that looked 5 times worse than the PK950. You are arguing against the wind. I believe the thrust of what he was saying was he did not expect the G20 to elevate to a level anything as badly as the G10 so he was returning the PK950. Whether he is right about this remains to be seen.

Welcome to the Forum BTW. Apologies for not noticing before.




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post #33 of 43 Old 09-04-2010, 01:50 PM
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Yeah, i'm sorry, i just re-read it, and i was wrong, it was late at night when i was making that post.

Anyway, i think D-Nice has already said that he has seen proof of a MLL rise in the G20's, so it's there allright.

Even if takes some time, the PK950 is still going to have a much better black level than the G20.

I was a panny lover myself, had a G10, which i had to return (it turned itself off, and wouldnt turn on again), so i got a G15 as a replacement.

Loved the set, the blacks, PQ, no image retention whatsoever, net features! And then it hit me, first rise: Slap one: It wasn't bad, still ok black, but again, slap two: No i was getting worried, i hope it doesn't get any worse, slap THREE!

My black level had tripled, and i got some nice image retention, lots of it. Couldnt leave my tv on a channel for more than one minute before it got IR, that was never a problem before.

I would get a Panasonic, but not with their rising blacks, no way! In that case i need a VT25, so at least i know that it will only triple from .002 to .006, but the VT25 cost is too expensive.

I'm probably getting a great deal through my brother, so i can get a PK950 for the same price as i was going to give for the PK550.

I've gotten a refund for my G15, so all i am waiting for is to find the right tv, if he can fix it, i will get the PK950. No more Panasonic for me (unless they remove that stupid volt adjustment bug).
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post #34 of 43 Old 09-04-2010, 09:32 PM
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I agree. Panny BL issues in '09 turned me from the 54V10, even with closeout pricing. When I upgraded this past March, the 58V10 with lower starting MLL was still over $600 more than the Sammy 58B650, which I bought. The Panny was tempting, even with the BL issue, but the pricing with such an issue was ridiculous. And the more I viewed the sets I had under consideration with the same feed and connections the less impressed I was with the Vs. The VT25s do look to be great sets but again the prices are simply not competitive.




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post #35 of 43 Old 09-05-2010, 11:58 AM
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My 50G25 (March build) has risen from 0.006 ftL to 0.012 ftL. I had no rise from 0-1500 hours, I am now past 2000 hours and just did a measurement the other day and saw the rise finally started for me. All readings were taken in THX mode. Meter used was an i1 Display LT.

1st picture: 5 Hours - Initial Reading
2nd picture: 100 Hours - Calibration
3rd picture: 2000+ Hours - Check/Recalibrate

 

50G25 chc files.zip 21.390625k . file
LL
LL
LL
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post #36 of 43 Old 09-05-2010, 01:33 PM
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Quote:
Originally Posted by Smoof15 View Post

My 50G25 (March build) has risen from 0.006 ftL to 0.011 ftL. I had no rise from 0-1500 hours, I am now past 2000 hours and just did a measurement the other day and saw the rise finally started for me.

Coincidentally, the review dates seem to be May and June from Cnet and HTMag respectively--suggesting Panasonic (presumably) sent out review samples from later batches.
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post #37 of 43 Old 09-05-2010, 03:00 PM
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Smoof,

What meter are you using?

Larry
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post #38 of 43 Old 09-05-2010, 03:10 PM
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Larry, I am using an i1 Display LT.
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post #39 of 43 Old 09-05-2010, 03:19 PM
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The spec for an i1 D2 or LT is 0.05 cd.m^2 -- or about 0.015 ftL. I have never achieved repeatable values below this value with my LT. (My Pro is even worse at these low light levels.)

See how repeatable a reading you can get using the continuous reading function in HCFR.

Larry
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post #40 of 43 Old 09-05-2010, 03:54 PM
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I don't remember ever seeing a calibration report by Chad that showed any data below 20% luminance.

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post #41 of 43 Old 09-05-2010, 04:27 PM
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I think if I had Chad living 10 minutes away from me he'd be on speed dial 24/7!!
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post #42 of 43 Old 09-05-2010, 04:32 PM
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It's interesting. A few years ago, X-rite published specifications for the D2/LT. They showed a range starting at 0.02 cd/m^2 (~ 0.006 ftL.) Now X-rite does not publish specs for this model.

Also, a few years ago Tom Huffman tested the D2/LT and found that it was indeed accurate down to that level (0.006 ftL) and even a bit below. Sorry, but I can't find the link.

SpectraCal (I think) shows a minimum reading spec of 0.05 cd/m^2 (~ 0.015 ftL) for the D2/LT.

Go figure.

Larry
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post #43 of 43 Old 09-06-2010, 07:28 AM
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Quote:
Originally Posted by tomwil View Post

Just keep in mind that these review TVs were supplied by Panasonic themselves. It is not like Consumer Reports, who purchase off-the-store-shelf items to review to eliminate any innuendo of fraud.

CNET:



Home Theater:

I was surprised to find out that Consumer Reports received the 50V20 directly from Panasonic. There may be a few other TVs they got from the manufacturer as well.

Flat panel TV have greatly speeded up adoption of HDTV in many households and CR was trying to get some test results up ASAP.

At this point, I think they are back to purchasing TVs retail and having them shipped to their lab.
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