EXCERPT page containing first few paragraphs. 2021-05-12 20:48:39
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See also the same test run several years prior on the Fujifilm GFX100.
This page looks at dark frame pattern noise at ISO 100, including the individual color channels (ProPhotoRGB color space) with both 14-bit and 16-bit captures.
All cameras have noise in the near-black shadows. One way to assess what gremlins might pop up in real-world images is to look at a dark frame shot with the lens cap on, at a high shutter speed—essentially zero exposure and thus capturing pure noise.
Dark frame noise, 14-bit and 16-bit
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These systems are hugely expensive, so make the right choice for your own needs (full frame vs medium format).
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