flare and ghosting

Have you ever noticed a faint pat­tern of colour­ful cir­cles or dots—most promi­nent­ly red, but also green and blue—when tak­ing a pho­to with a bright light source in the frame? That’s grid flare, although it’s also called flare grid pat­tern and red dot flare. It’s a unique quirk of dig­i­tal cam­era sen­sors that can be dis­tract­ing …

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