I have become rather obsessed with noise in my images. A summer where I tried to image with my Canon600D modified for astro was difficult as my images were plagued by high levels of noise. I noticed that my sensor was reaching about 7 degrees above ambient according to APT. This meant my sensor was often at about 34 degrees C. My images were really noisy.
This prompted me to get a new camera and I ordered the ZWO ASI533 MC PRO hoping that a cooled camera could change things. It has been about three months now that I have used the new camera and noise is much less of a problem!
However, I do see that noise is being amplified in my processing workflow. So I ask this question:
When in the workflow should noise reduction be done? I think it should be done early on right?
Should noise reduction be repeated after the workflow?
I currently have three ways at least of reducing noise while processing images in Photoshop.
- Camera Raw Filter
- Astro Flat Pro by Pro digital software
- Colormancer Photoshop plugin
Any suggestions on when I should reduce noise to minimize it, and which of the above works best for you.