This was my first attempt at photographing the Orion Nebula (M42).
I took the images 3 days after the full moon, but the moon was already below the horizon. I was located in a Bortle 5.33 zone.
Equipment
Canon 1300D (no modifications), tracker Omegon LX 3, Tamron 70–210 mm F/4.0–5.6, 3D-printed Bahtinov mask for focusing
Images
Lights: 252 × 10 s, ISO 1600, F9
Bias: 10
Darks: 10
Flats: 10
Total exposure time: 42 min
Processing
For processing I used Siril. First I extracted the background and adjusted the colors. Then I started stretching the image. During this process the image became brighter and the noise became extreme. I then stopped the processing and first tried to denoise the image in GraXpert, but it didn’t work. So I started the processing again in Siril and this is the result. I don’t understand why the images are so extremely noisy.
Does anyone have tips on how I can avoid the noise or remove it during processing?
by rick_jablonski
1 Comment
With your setup, you should be able to get a better image. I’m also a beginner, so those with more experience will be able to give you more precise instructions than I can.
I would suggest using denoising before stretching. However, it seems to me that the stretching phase also contains errors. You can try using the Veralux Hypermetric Stretch script, which generally does a very good job of automatic stretching.
I also see that you shot at F9. You could try shooting with a wider aperture. Also, if you have the opportunity to shoot again, you could collect more dark and flat frames.