A7sII Horizontal Noise in Slog ISO1600 to 10000

Post » Wed Nov 25, 2015 8:56 pm

I'm noticing on my a7sII that the noise is very bad when using any s-log or ITU709(800%) gamma between ISO's 1600 and 10000. There is kind of a horizontal pattern to it. Strangely, it disappears and becomes cleaner at ISO 12800. I don't have the high iso noise reduction turned on. If I go back down from 12800 to 10000, 10000 is then clean as well, but if I go back down to 8000 and it's bad again.

I have a link to a youtube video illustrating that below.

From the test footage that others have put online, it seems that this camera should not be noisey at ISO's this low. Do I have a lemon camera? Can someone else test their camera in low light and see if you are also seeing this horizontal noise? Please let me know asap. I may be returning my a7sII if I can't get this resolved.

Link here: https://www.youtube.com/watch?v=dTbcih6rqyg

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Spooky Angel
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Post » Wed Nov 25, 2015 8:33 pm

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Richard Dixon
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Post » Wed Nov 25, 2015 9:16 pm

Hi robertmethew. That's all good info, but I don't understand how it is relevant to my post?

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Alex Vincent
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Post » Wed Nov 25, 2015 9:19 pm

Not only yours behave like this... Done some quick test and noise pattern are much different at 8k, 10k and 12k iso - have to test this more deeply, but looks like issue that sony will have to work on

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Jani Eayon
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Post » Wed Nov 25, 2015 8:53 pm

I made another Video that is a little more clear to illustrate the issue, and also explores more iso's. See test 2 here: https://youtu.be/aB7WgSGY0YU Also, I did one in PP5-Cine2 gamma, and it is so much cleaner by comparison. See Test 3 here: https://youtu.be/d2yybsokLkc

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Averielle Garcia
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Post » Wed Nov 25, 2015 8:07 pm

Could you upload somewhere oryginal files - youtube compression is making one big mess on them...?

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Oyuki Manson Lavey
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Post » Wed Nov 25, 2015 8:05 pm

You can download it via my dropbox with this direct link. It's a large file. It's about 1.4GB.


I'll keep it up for a while, but eventually I'll need to pull it down for file size reasons.

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Elena Alina
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