Well, that depends… mostly on what filter(s) you’re using and what object you’re imaging. If you’re imaging in mono, using narrowband filters, you probably know everything below, and you can get better data and images in worse conditions. But if you’re using a dual, tri or quad-band filter with a color camera and imaging any one of the endless number of Ha & OIII rich objects in the sky, you don’t have to just settle for the endless sea of red nebulosity.
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Katorella Astro 