EF-M 22 f/2 - sky phenomenon or bug?

[Don Haines]

I just got around to processing the CR2 files with DPP4 to TIFF and neither image shows the rings. i'm thinking that is because RAW files do not use any of the camera corrections. It would only show up in the JPGs direct from the camera. Is that a correct assumption?

That would make sense....

If that is true, a firmware update could solve the problem.... Also, the camera has limited processing power and as such, the file converter will never be as good as the one in DPP4....

 

[Deleted member 378664]

Meanwhile I found the rot cause.

Lately I repeated a series of photos at the same location with nearly the same environmental conditons with different f-values in 1 stop increments from f/2 to f/11.
I also varied the different possibilities for in camera lens correction.

The problem occured only with the photos taken with f/11 independently from the in camera lens correction settings.

the fault was my automatically applied lens correction preset during lightroom import.
When I import the photos without the lens correction from LR I don't see those circles.
So it seems to be a problem with the lens correction profile for the 22mm lens in LR espacially with photos taken with f/11.

kind regards
Frank