Typically, DNG files store raw data from cameras in either normal RGB or Bayer RGB. Whether it's normal or Bayer RGB is specified by the Photometric Interpretation tag in the SubIDF for the raw data. However, what if the raw source image is coming from a scientific camera (such as one designed for astrophotography) that does not capture any color at all (it only captures grayscale brightness levels, in a single-channel 16bpp raw image)? What if I want to convert the raw images from such a camera to DNG? Does DNG support raw grayscale images? Or is this feature not yet officially available in the DNG format?
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