Hello everyone, a friend of mine has just sent me a picture made in pro mode with a samsung s20 ( sm-g980f) that has a really strange artifact in the lower left.
Do you think it is a damaged phone, or it is defective by design? Or a software problem? The jpeg is so contrasty that the area is fully black.
Here a sample, the original jpeg, a jpeg developed with art (neutral) and a bit lightned: https://we.tl/t-HhtJnGLvxb
Original raw here: https://we.tl/t-LUPWtEwsjh
Thank you in advance.
First I thought of an overheated sensor, but the area with better colours is almost circular in the center with wrong colours around. And in thinner circle there are dfferently tinted concentric zones. Fascinating 
Looks like this one (disclaimer, I haven’t checked the raw yet):
My guess is that the sensor is defective.
The image posted by @Sunhillow shows large purple arcs in bottom-right. (Not bottom-left.) Is that the problem reported by @ggc? We have a bright sun, probably slightly left of centre. I suspect simple lens flare. If the problem doesn’t show in photos without a strong light in-picture (EDIT or strong light that is out of picture but shining on the lens), I would bet on lens flare.
You can also see some purple off-colour with circular border in the trees on the left river shore. Looks like mainly green is affected.
Thank you everyone!
From the dpreview thread, i noticed “Scaling of the raw data by a multiplier”, that would be really bad but seems plausible… since it’s not mine, i’ll suggest having phone refunded, since it was also rather an expensive one… and without raw for 2 of 3 lenses.
The sun was already down. And some picture that she took before didn’t have problems, at least not so huge problems.
@agriggio thank you for the try, nice!
edit: another idea, the raw doesn’t seem to have vignetting… so maybe raw vignetting autocorrection. Really bad anyway.
