Quote:
Originally Posted by astronobob
Yeah nice going Rodney, it’s amazing how we perceive the night sky light and what the cameras can actually pick up, I would have thought to set the aperture closer to f 3.5 - f 4ish to collect the photon a bit quicker but I’m not familiar with the 14mm, also effects sharpness and and coma if set too fast.
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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.