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E-5 VS E-M5 mark 2 iso test

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  • #16
    Re: E-5 VS E-M5 mark 2 iso test

    Pixel mapping - it's a maintenance function; a process to find and hide faulty pixels. These pixels are mapped out permanently.

    Dark frame subtraction happens only after long multi-second exposures. It's a similar process to pixel mapping but the dark frame time matches the exposure time, which is longer than the dark frame time in ordinary pixel mapping.

    Dark frame subtraction mops up further bad pixels not dealt with by pixel mapping. These are only revealed by very long exposures. However, I don't believe they are permanently mapped out.

    Ian
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