Lightnings taking a ride

by ceinmart

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Since you're looking at the pixel level, these artifacts are too small to be dust. It's also unlikely that dust would be outlined sharply when you're using a wide aperture. I think it's most likely that they are random shot noise combined with demosaicing artifacts, possibly then also smoothed out by denoising.


From my experience multi-coatings on lenses, when the IR filter over the sensor is removed, reflects the aperture in the form of white spot(s). On some lenses (Nikkor 35/2.0 which have very pale coatings) I don't have the white spots, and the picture is generally much sharper. On macro and lenses with intensive multi-coatings, I notice that the effect is ...

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