Hi,
I want to share what I've seen shooting some pictures (DNG format) with my mini 2 tonight, just to understand if it's a standard behaviour during low light shots.
So I cleaned the mini 2 lens before the take off, after some shots (iso 100 and 4sec shot duration) of the Maggiore lake (there were no stars in the sky as it was cloudy) the result is attached. DNG night shots sample I put also the jpeg format with no issue (I think the link stays active for a week).
Several bright pixels are seen throughout the photo. When I change the shot, they remain fixed in the photo. This effect is not seen in the jpeg format (I think the compression removes the spots I think) of the same photo.
Can you check if also you have the same behaviour?
Here the shots parameter I set:

Dark enviroment with some city lights
Cloudy sky

ISO 100
0 ev
f 2.8
4sec time shot duration

Aircraft Firmware: v01.01.0700
Thanks for your attention and Best wishes

Lake DNG

Lake DNG pixels

  

Here is a sample shot in a room with low light, 4 second exposure and 100 iso. I think is it ok to have that noise pixels in DNG format.

DNG in low light

jpg

What do you think?

It is called "hot pixel" and it appears on long exposure in digital camera's. And since you have been exposing for 4 secs ...

The jpg conversion probably removed those "hot pixels".

https://www.premiumbeat.com/blog ... can-you-remove-one/

JohnDG Posted at 12-27 06:59
It is called "hot pixel" and it appears on long exposure in digital camera's. And since you have been exposing for 4 secs ...

The jpg conversion probably removed those "hot pixels".

Thanks  for your support.
I was looking for the "hot pixels" definition you described.
Best regards.