jeep_daddy wrote:
DNG strips out some of the unrecognized meta data (such as Active D-Lighting and Picture Control) from RAW files, making it impossible to retrieve this data from DNG in the future. On my Canon raw files it strips out changes I've made in camera for a different crop ratio, focus points, Picture Styles, and some of the various different safety lighting features for exposure. I'm not saying that I've needed any of this stuff very often, but I don't want anything stripped out of my files.
Interesting.
On my Nikon NEF to DNG conversion, focus points, picture control & Active -D setting is retained within the DNG EXIF, in fact, since I shoot raw, I always leave Active -D off and my picture controls set to neutral since they only affect the jpg output, opting instead to process the raw myself.
I always assumed I was losing my focus point data, but it was really my going from Aperture to Lightroom, and Lightroom's not including a focus point toggle to display focus points until I found the show focus point plugin for Lightroom and discovered that the data was indeed still there.