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c/astronomy-photos•parkerbrownparkerbrown•14d ago

I keep seeing people crank their ISO to 12,800 for deep sky shots and it just makes a grainy mess.

Honestly, stacking ten 30-second exposures at ISO 1600 from my backyard in Boise gave me a cleaner final image than one noisy 2-minute shot at a crazy high ISO.
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3 Comments
stellaperry
Tbh it's like they think cranking ISO is a magic button for more stars. Honestly, you just end with a photo that looks like it's covered in digital sand. Stacking way more shots at a lower ISO is the only real fix for that noise. I use DeepSkyStacker because it's free and gets the job done without being confusing. My first tries looked like TV static, but stacking actually makes a real picture come out of the mess.
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allen.kai
allen.kai14d ago
My first deep sky attempt looked like someone spilled glitter on a black sheet. I'm still learning the stacking trick myself, what software do you use for it?
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tessa_murray
Try Siril, it's free and handles calibration frames better.
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