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p.1 #1 · p.1 #1 · 5D3, 6D and D600 true RAW (dcraw) comparison | |
I have done a proper true RAW comparison (using dcraw only for demosaicing) between 5D3, 6D and D600 using the RAW files from www.focus-numerique.com. These are 100% crops from each camera, comparing aproximately the same subject (thus, the D600 image has the greater area and the smaller comes from 6D). Note that dcraw still doesn't natively supports the 6D, thus these results must be taken with caution (anyway, at least they are useful compared with any jpeg from camera or most jpeg conversions, usually garbage in order to make any conclusion).
Each picture has a label bellow indicating the camera name and ISO level (100-102400, except for the D600 which maxes out at 25600). Left is 5D3, center 6D and right D600. Warning, huge file (32 Mbytes) at 98% jpeg quality:
6D vs 5D3 vs D600
It seems that 6D has appreciable less noise than 5D3, more importantly at low ISO settings, far beyond the improvement expected for the slightly higher pixel size. It closes some of the gap in the shadows with the Sony sensor (D600 has still a bit less noise, though). At high ISO settings the 6D has a bit less noise than D600 (but note that D600 has nearly 20% more pixels, thus at image level they both could be very similar). I suspect that 6D will improve the dynamic range at low ISO settings. Canon is hearing, but needs more time... :-)
I have used the dcraw tool, "upgraded" for supporting the 6D. Using default values, of course no noise reduction, and the white balance calculated by averaging the full image (instead of by the camera). Dcraw conversion (at least without tweakings) maybe is not the best, and artifacts are visible, but indeed has no noise reduction at all.
I'm not sure if the colors are accurate for the 6D, since I manually upgraded dcraw for the 6D, only to take into account the masked pixels at the image border. This could also impact in the noise (I'm not sure) thus these results should still be taken with caution, until dcraw is properly upgraded by its author. Meanwhile the current version can be easily patched by searching the line containing "5920" (the 5D3 raw image width) and adding a new block (e.g. just bellow it) like this:
} else if (is_canon && raw_width == 5568) {
height = 3670;
width = 5496;
top_margin = 38;
left_margin = 72;
(5568 is the 6D raw image width, but the max. usable area is 5496x3670).
You can download dcraw source code from Dave Coffin's page (www.cybercom.net/~dcoffin/dcraw/)
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