Hi Lage,
in your integration I see vertical streaks and colored blotches. The blotches are not a moire pattern. In your image north is at the left side, so the vertical streaks are in east - west direction, i.e. in RA. The issues are definitely not caused by different alignment of the two sets. Presumably wrong / missing image calibration and not dithering are causing these artifacts. (The blotches have a large scale and will not be removed by dithering though.) However, some more information might help to classify the issue correctly:
- Which camera model did you use?
- Which exposure time was used for the subframes?
- Did you dither between subframes (presumably not or not sufficiently)?
- Did you calibrate the frames with a MasterDark and a MasterFlat?
If the answer to the last question is yes:
- How did you capture the dark frames? Presuamably the DSLR camera is not equipped with a cooling device. Were the dark frames captured at an ambient temperatures similar to the ambient temperature when the light frames were captured?
- How did you prepare the master calibration files and what were the settings for ImageCalibration?
Bernd
