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Sony 16-35mm f.4 Green Halo problem | ASTRO


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Hello fellow photographers!

i’ve been using the A7III for about a year and im getting around it pretty well. It was great for everything except a problem noticed when i tried to do some astrophotography. There is this annoying green circle / halo / flare that seems to be there no matter what, when in low light. I’m using the sony 16-36mm f.4 lens.

I shoot at low ISO to avoid noise and then boost the exposure in lightroom.

here is the same image edited with more or less exposure :

47094286-D9E6-4FFA-B84C-B1376BAE5FCA.jpeg

D913E95D-D662-4EE7-B73C-9B95F3C2AB3E.jpeg
 

Thank you ! :)

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I recollect reading a similar topic on this forum but can't find it right now. I'll look for it a bit more.

That being said, there's no such thing as a magic trick to prevent noise by shooting low ISO and raising exposure in post. ISO doesn't cause noise: it is already there in your photo even at ISO 100 and is amplified by raising ISO just like Lightroom amplifies noise if you raise exposure. In fact, your camera is better at preserving dynamic range than what you would get by boosting exposure in post, especially when going over ISO 640.

https://www.dpreview.com/articles/3389926460/sony-a7-iii-dynamic-range-and-high-iso-improve-over-its-predecessor

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