EXCERPT page containing first few paragraphs. 2021-05-14 08:38:49
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This same pixel column defect was documented with the CCD sensor in the Leica M9 in Sensor Defect: Bad Pixel Column (M9 CCD).
Bad individual pixels are unavoidable, and are routinely mapped out by camera firmware. Pixels can also be “killed” by cosmic rays even after the camera has shipped; this can be fixed by most vendors, again via a firmware update. Single bad pixels, even thousands of them (typical), are simply not an issue in a 24 megapixel sensor. But an entire bad pixel column has troublesome effects for the “wrong” subject matter, as is shown here.
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