2004.09.27 13:38 "[Tiff] New Adobe DNG (Digital NeGative) TIFF Specification", by Frank Warmerdam

2004.09.28 22:42 "Re: [Tiff] New Adobe DNG (Digital NeGative) TIFF Specification", by Chris Cox

Aw, man, BestQualityScale and MakerNoteSafety are each specified as 50741.

DNG Spec., page 22: BestQualityScale Tag 50741...
DNG Spec., page 35: MakerNoteSafety Tag 50741...

Yes, this was a typo in the specification.

BestQualityScale should be 50780.

Chris