Image Stacking Quick Overview

I've been playing around with image stacking lately, combining multiple high ISO images of the same scene into one clean, low-noise image.

Some notes: The relationship between stacked images and the noise reduction effect seems to be squared, not doublings, so you must combine: Four images for a one stop ISO improvement, not two. Eight images for a two stop improvement. 16 images for a three stop improvement.

I've been using Affinity Photo 2 to do my image stacking, but I imagine there are other free and open source programs out there as well.

Happy shooting!

http://kyleclements.com ... https://www.youtube.com/watch?v=rJzKGRALLyc