I get a .BIA file additional to the .RAW and .JPG file. Is this normal?

Yes, that is perfectly ok.

The BIA file or Black Image Acquisition as I call it will be taken by your camera with shutter speeds slower than 1/30 of a second. It will be taken after the shutter has closed to get a dark frame at a similar time and with in the same circumstances. The dark frame can then be used to fix “hot pixels” (= pixels that become unreasonably bright with longer exposures) If during conversion an accompagnying BIA file to the RAW is found it will be automatically subtracted from the image if you do the conversion with the -b parameter.

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← I get a .BIA file additional to the .RAW and .JPG file. Is this normal?

One thought on “I get a .BIA file additional to the .RAW and .JPG file. Is this normal?

  1. Arvid says:

    Hi Adrian, 
    this is perfectly normal. The BIA stands for Blacklevel Image Acquisition I think. It only happens for dark images with exposure times around 1/15s and longer. No worries! M8raw2dng can handle that. 
    Only negative side effect is that you are losing the LCD preview for that image as you already noticed. Seems to be a bug of the M8…
    Cheers, 
    Arvid

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