dng files?! anyway to convert back to cr2?

after i updated to a new lightroom, (or after i switched to a 5d mkII), importing files turned from cr2's to dng. i thought nothing about it as i thought it was some kind of new file either lr or the 5dmkii had.

after finish processing all my pictures and exporting them to a folder, i noticed they were all resized smaller!!! (i.e. 453 kb, and 720x480). is there a way i can convert dng back to cr2? or will the resized picture affect the way my clients print their photos? help!

Peter

hmm okay..so i exported a cr2 file too and its still coming out resized. is there something i did to make it export resized?

DNG files are just the raw data re-wrapped in a fully documented format. You've probably set that in the import dialog.

The resizing - check you export dialog. That's where you'd be resizing.

Victoria Bampton wrote in post #10305574
DNG files are just the raw data re-wrapped in a fully documented format. You've probably set that in the import dialog.

The resizing - check you export dialog. That's where you'd be resizing.

Though it does look like the raw data is embedded in the DNG frame, at least according to the DNG design spec, getting at that data is not quite so easy. A quick google seems to pop up more sites lamenting the inability to extract the raw data. Doesn't look like it would be a hard program to write though unless it's stripped off the CR2 header and just embedded the raw data itself. Then it would be useless as recreating the CR2 frame would be difficult.

So you didn't save your cr2 files, as is, anywhere? Have you erased your cards?

gjl711 wrote in post #10305665
Though it does look like the raw data is embedded in the DNG frame, at least according to the DNG design spec, getting at that data is not quite so easy. A quick google seems to pop up more sites lamenting the inability to extract the raw data. Doesn't look like it would be a hard program to write though unless it's stripped off the CR2 header and just embedded the raw data itself. Then it would be useless as recreating the CR2 frame would be difficult.

Correct. I didn't mean that you could rebuild a CR2 from the DNG file, but just that there's no loss of quality in the conversion. You can't rebuild a CR2 because it's not fully documented. You can only extract a CR2 if you've embedded the CR2 in the DNG wrapper too, which doubles the size and largely defeats the object.

pli wrote in post #10305508
hmm okay..so i exported a cr2 file too and its still coming out resized. is there something i did to make it export resized?

So did you figure out your export resizing that was causing the problem?

Agree with Vic. Conversion to dng happens without loss of size.
I convert to dng on import then export as tif without any loss.