Best way to integrate different exposures and gains  


Main Sequence Star Customer
Joined: 1 year  ago
Posts: 33
November 8, 2018 12:07  

I have about 20 hours of Ha on Orion (M42) All the same camera (ASI-1600MM-C) and focal length but with different exposure times and different gain settings. The idea behind this is to try and produce a High Dynamic Range (HDR)  image by blending the different images.

What I have are:-

  • 15 Second Subs at Gain 75/15
  • 180 Second Subs at Gain 75/15
  • 180 Second Subs at Gain 139/21
  • 9000 Second (15M) Subs at Gain 75/15 ( This was an accident when SGPRO changed seconds to minutes for some strange reason) Stack looks pretty good


My questions are:

  1. Is this the wrong approach. 
  2. If not what would be the best way to stack all this data to achieve the best HDR results


Thank you for your help

This topic was modified 6 days  ago 2 times by lanties