On Tue, Dec 30, 2008 at 10:15:54PM -0800, Mark Erickson wrote:
> Thanks, Godfrey.  You've confirmed what I thought Lightroom was
> doing--I just wanted to be sure that I wasn't missing anything.
> I do have the compression preference set, and was a little surprised
> that the imported files weren't compressed.  

With a PEF, Pentax are allowed to specify their own compression scheme.
A compressed DNG must use the format that Adobe have specified.  That's
extra firmware Pentax would have to write (and, depending on the exact
capabilities of the on-board processor, it may well also run noticeably
slower than the PEF compression code).

I'm just glad that Pentax decided to support in-camera DNG in any fashion.


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