I had some old data of Carina taken in Feb 2006. It was 30x120sec at an ISO of 800 taken with the Canon 5DH and Canon 300mm F2.8L at F2.8.
All RAW files converted to 16bit Tiff with ImagesPlus then stacked the odd and even frames separately with RegiStar as medians. Then these two stacked frames were then again stacked with RegiStar as a SUM. This is the equivalent of doubling the exposure to 240secs.
This was then digitally developed with IP and levels and in PS, one version to get all detail in the image and the other to only show the brighter detail.
Here they are
2.2MB
http://avandonkbl.bigblog.com.au/dat...1124131416.jpg
2.0MB
http://avandonkbl.bigblog.com.au/dat...1124131416.jpg
Which one is better?
Bert