Stacking: How To Reduce Noise In Photoshop For Astrophotography Like a Pro
We've established that the best method to reduce noise in your images is stacking. There's just no match to layering multiple exposures and taking either the average or the median of those. In the mean time, I've received tons of questions about how you actually do this with your own images and I came across this great tutorial video by no other than Ian Norman of The Lonely Speck.