12 bit ADC camera conversion to BITPIX = 16 FITS files

Discussion in 'Image Capture' started by Jesse, Feb 8, 2017.

  1. Jesse

    Jesse Cyanogen Customer

    Oct 11, 2014
    Looking at the FITS file of an image taken with a camera with a 12 bit ADC (a ZWO ASI1600MM) it looks like the 12 bit values are multiplied by 4. If this is correct, is the multiplication typically done by MaxIm (say after reading the ASCOM MaxADU property), is it done by the camera or can it be done by either? If it's done by MaxIm is there any way to turn this off, or at least add a keyword indicating that a multiplication was used?

  2. Doug

    Doug Staff Member

    Sep 25, 2014
    We're not doing it. MaxIm DL just passes through the numbers we get from the camera driver.

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