Combining Multiple Exposures

Dr. Brown's Stack-a-matic is a quite a cool tool to check out. My father sent me a link to the Russell Brown Show a few weeks ago and I have been hooked since. There is a ton of information on his site for anyone interested in photography & photoshop.
Combining Multiple Exposures was the first tutorial I wanted to try out just because of previous attempts at capturing star trails. Dr. Brown's tutorial goes over everything you need to know to get the results shown in the images below. All three images were shot at f5.6, 119.0 seconds, ISO 200. The first image was a total of 123 jpeg images and took a little over 4 hours. Second image had a total of 70+ jpeg images shot for roughly 2 hours. Last image is 81 RAW files for 2+ hours. I was checking to see if file size would speed the stacking process up a bit, not really though. Have patience, it does take some time. The 123 image file took almost 2 hours to fully process into the final image.
Check out "The Russell Brown Show" for more information.
Images by Joe Hamilton Photography






Link:
http://www.russellbrown.com/tips_tech.html