This is certainly true for Canon and Nikon raw files. For nearly all raw formats (the main except being medium format camera backs), all the metadata (including the camera maker's private metadata data) is preserved in the DNG file created by Adobe software at default compatiblity settings. I don't know what they are talking about. If it's proprietary "Maker Notes" data, that stuff is usually only fully readable by the camera manufacturer's own software. I can't imagine what "calibration data" are provided in (say) a CR2 that wouldn't also be provided in a DNG copy of the same CR2 or which data in a Raw file "drive" Optics Pro's (excellent) NR functionality that would not be in the DNG too.
Adobe dng converter 9.0 pro#
This is the reason why Optics Pro only supports the DNG files generated by the cameras we calibrated in our labs, and for now we’d rather focus on extending our camera coverage than working on generic support for DNG files.It sounds plausible on first blush, but I don't know if it's true. Therefore, even if Optics Pro could process DNG files without the data it requires, it could not achieve the same quality level as with an original RAW file, and we do not believe people who shoot RAW would be interested in such a substandard solution. We understand the issue with this format and here is an explanation: a DNG file cannot be used as just another RAW input file, since it does not contain all the calibration data Optics Pro uses when processing RAW files (especially, but not only, for the denoising algorithm).
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