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I've been stacking my astro shots for 5 years and just realized my flats were all wrong after a talk at the Tucson star party.
The speaker pointed out that my flats, taken at dawn, were capturing a changing sky gradient, which explained the weird uneven backgrounds in my final images.
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foster.patricia20h ago
But I've always had good luck with dawn flats myself...
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ramirez.blair15h ago
Seriously, is a dish soap brand worth this much debate?
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