Equipment used:
- Lumix G85
- Lumix 100-300 f4-f5.6
- SA-GTI
Image:
- 10 sec, f/6.3, 6400 ISO
- 1200 Lights
- 50 Biases, Darks, Flats
Stacked using Siril and edited in GIMP
As you can see, there is a lot of noise, even with heavy editing and noise reduction in siril as well as in GIMP, and I’m out of ideas of what could cause it. I tried different exposures (from 10s to 30s), different ISOs (1600-6400). I tried to manually dither by moving the mount through the App every 30 minutes or so. I also used a lens dew heater at different temperatures ranging from 15°C to -5°C with no difference in noise.
I got a successful result a few months ago with the Orion nebula, the only differences were the exposure of 5 seconds and a Omegon Mount MiniTrack LX3 Essentials mount which couldn’t be polar aligned very well. I can’t imagine that the difference from 5 to 10 seconds exposure did all the difference.
Can anyone help me?
In the final .fit the Red channel has, as expected, the fewest signal, but also the most noise in the dark areas of the image.
In the Raw subs I couldn’t make out a channel with more noise than another.