Quote:
Originally Posted by Ryderscope
Thanks Bob, agreed that it shows just how much ambient light there can be. For determining the best aperture to run this lens at, I took a number of test images starting from wide open at f2.8 and stepped down the lens gradually until I was satisfied with the star shapes around the edge of the field. I landed at f5.6 before I was happy and figured that I would rather go with longer integration times for the benefit of a better looking star field. I still find that I need to apply a small amount of BlurXterminator in Pixinsight to help tidy up the field during post processing.
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Ah yes indeed,, retaining all the 14mm captures, wide angle with a flat horizon too.