jrista said:
I was surprised by how often Canon's data changes from version to version of a CR2 raw file. Once I understood that, it made total sense why Adobe has such a hard time keeping ACR/LR up to date and working with every new model camera that Canon releases...they have to figure out what changed (which is NOT well documented, sometimes not documented at all, in Canon's stuff.
Interesting to know - and it is about the same on the hardware side, I know from ML: the cameras seem to be the same from the outside (digic4, 18mp sensor) but there are lots of small differences and changes that break simpe copy+past compatibility across all models.
Btw I also recently had a deeper look at the CR2 metadata as I wrote a watermarking and metatdata filter script (what to keep, what to delete for what purpose)... exiftool does an amazing job at decoding even the more obscure Canon tags, but I wouldn't want to imagine how long it took to get all this exif/iptc/xmp/makernotes stuff in order.