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post #1 of 4 Old 05-23-2020, 12:42 AM - Thread Starter
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Gamma thing...

Hi,
I have the LG um7100 tv and when I’m calibrating SDR I can clearly see that the TV almost perfectly follow the BT1886 curve without much effort of calibrating when it’s on 100 nits.

But when I’m reading around I do read that I should use the 2.4 power gamma and is that correct?
Also according to the reading I should use 2.2 gamma on the day mode?
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post #2 of 4 Old 05-23-2020, 01:52 AM
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Gamma thing...

Quote:
Originally Posted by rstolpe View Post
Hi,
I have the LG um7100 tv and when I’m calibrating SDR I can clearly see that the TV almost perfectly follow the BT1886 curve without much effort of calibrating when it’s on 100 nits.

But when I’m reading around I do read that I should use the 2.4 power gamma and is that correct?
Also according to the reading I should use 2.2 gamma on the day mode?

Yes 2.2 is generally recommended for a day mode , bt1886 a fine for a night mode especially on a set like yours.


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post #3 of 4 Old 05-27-2020, 10:41 PM
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Quote:
Originally Posted by rstolpe View Post
Hi,
I have the LG um7100 tv and when I’m calibrating SDR I can clearly see that the TV almost perfectly follow the BT1886 curve without much effort of calibrating when it’s on 100 nits.

But when I’m reading around I do read that I should use the 2.4 power gamma and is that correct?
Also according to the reading I should use 2.2 gamma on the day mode?
BT.1886 is the correct gamma to use on an LCD for a night mode compared to 2.4 power gamma, as BT.1886 accounts for back light bleeding through on your TV on a black test pattern. On an OLED, it doesn't matter, as BT.1886 and 2.4 gamma will end up exactly the same, as a black test pattern on OLED looks the same as the TV turned off.

https://kb.portrait.com/help/bt-1886...ons-10-answers
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post #4 of 4 Old 05-28-2020, 12:39 AM
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Please see: https://www.lightspace.lightillusion...l#bt1886_gamma
BT1886 is a flawed concept, and we do not recommend it.
Few post houses use it for this very reason, so little source material is mastered via it.

Steve

Steve Shaw
LIGHT ILLUSION

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