Basic question: Why do you convert to DNG?
From reviewing data on DPReview for the M8 (10.3MB) and X-T1 (16MP)
(X-Pro 1 raw file size not available in the review) the M8's raw file is
10.3MB and the Fuji X-T1 (same 16MP sensor size) is 32.2MB.
If these files were stored in non-compressed TIFF files (DNG is
basically a TIFF file) the M8 would require (assuming 6 bytes/pixel)
61.8MB and the Fuji would require 96MB. The fact that their raw files
don't require nearly this much space clearly shows that the raw files
incorporate some form of compression and probably bit-packing of the
pixel data as well.
The fact that the DNG fits into 50-60MB rather than 96 also indicates
some form of compression going on but clearly not as efficient... maybe
because the DNG is a lossless algorithm and the camera makers allow some
degree of loss. I once considered using DNG but, not having drunk the
Adobe DNG KoolAid, ultimately couldn't explain to myself why I should do so.
Chuck Norcutt
On 7/2/2014 3:28 AM, Nathan Wajsman wrote:
I have only had my Fuji X-Pro 1 for a couple of years, so those of
you who know my indifference towards technical details will not be
surprised that I discovered only this week that the DNG pictures
(once converted from RAW by Lightroom) from the Fuji are huge, 50-60
MB. This compares to the Leica M8 at around 7-8 MB. I shoot RAW only
(i.e. no RAW+JPG, pure RAW for me thank you), and while I suppose the
X-Pro 1 has more megapixels than the M8, I don't think it is that
many more.
Have others who have the Fuji X cameras noticed the same thing?
Good thing storage is cheap these days.
Cheers, Nathan
Nathan Wajsman Alicante, Spain http://www.frozenlight.eu
http://www.greatpix.eu PICTURE OF THE WEEK:
http://www.fotocycle.dk/paws Blog:
http://nathansmusings.wordpress.com/
YNWA
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