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next PZ lens test report - Sigma 14mm f/1.8 DG HSM ART
#57
     You asked what subject is on a flat plane to the corners.....astro photography is just that!

  

  I think you will find the most of the star deformations are caused by the maximum exposure of around 20 seconds, 10-15 secs is the point at which stars start to make trails ....which are always worse in the corners.

Dave's clichés
  


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next PZ lens test report - Sigma 14mm f/1.8 DG HSM ART - by davidmanze - 12-11-2017, 11:10 AM

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