Cool. Apparently my camera is more Scottish than both of yours. 
lol…
Your camera’s model is from 2010, mine from 2005, Claes’s from 2014.
Can we draw a conclusion from what we have?
Are we seeing different stages of sensors life cycle (mine one step from the grave?..)
EDIT: Forgot to mention another thread from dpreview, not so technical as the other one, but where folks don’t have many questions in condemning a sensor with the same issue as mine: Canon 5d classic noise banding: Canon EOS-1D / 5D / 6D Talk Forum: Digital Photography Review
Fuji uses a different sensor pattern, it’s not Bayer its xtrans.
Humm, so it would be nice to have a more recent camera example…
I have EOS 6D. Fastest speed is 1/4000sec. Here is the link to the raw file with 1/4000, f/8, ISO200.
https://drive.google.com/open?id=1b39fa3yVq8W3HD5NRbRMkHCRR6M4bRQV
May I ask what this is good for (without reading the dpreview thread)? Just being curious…
Something related to Dark-Frame - RawPedia and PIXLS.US - How to create camera noise profiles for darktable?
Sorry, I should have made it clear from the beginning.
I had already addressed this question before here in the forum when I edited a picture I took with this old camera I bought a month ago.
Today, while editing another picture, the bands showed up again but, this time, I researched the Internet to see what they mean, and found this post where they were doing the steps above to reveal the noise pattern.
I’ve asked for this test to confirm what they say on the web, which is, basically, the sensor end-of-life, and that a newer camera wouldn’t show that pattern.
So, although I still get good images when the light is good and uniform, it seems that the camera shows its limits in recovering deeper shadows.
Here’s the picture I was editing today (exposure + filmic):
EDIT: I tried using that black frame in Rawtherapee’s raw tab to reduce the effect, but no success.
Thanks, @Claes, another non-Bayer sensor, from a quick research (thank @paperdigits for pointing that)
LX3 is Bayer.
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Life of camera sensor? never heard of that!
Morning, Rei,
Do you need more samples?
If you want, I could dig up the old
Canon EOS 600D (it’s Bayer!) and
perform the test…
Have fun!
Claes in Lund, Sweden
It’s called banding. My Canon 5D (first version) had banding all the time - since purchase. Saw the same artefacts in 5D II and III series. It’s most likely the way those Canon cameras are. Do you need to worry about it? Probably not.
Good morning, Claes.
If that won’t give you too much trouble, I’d really appreciate to see a dark frame from that one.
Thanks @shreedhar for bringing that. So the strong, uneven banding seems to be more of a defect.
Or it’s just the way it is, according to @mosaster experience.
As for worrying about it, yes, probably I shouldn’t.
But I didn’t expect to find such well defined pattern in deep shadow areas, which leads me to think that I will have to take extra care/planning when shooting in circumstances similar to the dog picture I posted above.
Out of curiosity, below is a dark frame from a Canon Powershot A3100 (2010) and its huge amounts of random noise, but almost no banding. Not sure however if the comparison applies, being it a dng file out of chdk add-on.
If you have Canon then you might want to try Magic Lanrern. If I remeber correctly they had some kind of solution to mitigate banding. In my experience banding was uneven and, yes, it appeared if shadows were pulled up strongly or at high ISO mark. There are plenty of examples out there actually. Might attach one here so you can make sure it’s quite a common artefact in old models of cameras.
Actually it was the first thought I had as soon as I got my hands on it, but it appears that 5DI isn’t fully supported (there’s seems to be a mod, but with only a subset of all functionality). Maybe I give it a try anyway.
No need for that. Thanks anyway!
@Peter wow! I love those camera hacks! Very interesting, thanks! I’ll investigate if I can do something with that.