FastRawViewer displays standard (according to EXIF/DSC standard) tags and a very limited set of non-standard tags (mostly related to lens data).
We do not have any plans to extend metadata support to vendor specific (makernotes) tags because of:
Such tags are not documented in public documents, all/most interpretation are guesses.
There is no any guarantee that same tag means the same in different cameras from same vendor (or even in same camera/different firmware), so we're unable to provide reliable data interpretation for such tags.
Each camera group/camera (or even firmware version) requires separate handling, resulting in endless software tune.
If you trust exiv2 and/or Exiftool interpretatons: use software you trust (e.g. Exiftool + some GUI) for vendor makernotes display.
FastRawViewer displays
FastRawViewer displays standard (according to EXIF/DSC standard) tags and a very limited set of non-standard tags (mostly related to lens data).
We do not have any plans to extend metadata support to vendor specific (makernotes) tags because of:
If you trust exiv2 and/or Exiftool interpretatons: use software you trust (e.g. Exiftool + some GUI) for vendor makernotes display.
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Alex Tutubalin/FastRawViewer team