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RAW converters compared (contd.)

Noise reduction

Digital Photo Professional 2.1 includes optionally selectable noise reduction for both luminance and chrominance (color) type noise reduction selectable in a range of three steps (None, Low, High). In our tests this noise reduction while partially effective wasn't as flexible or as good as that found in other third party noise reduction or RAW conversion tools. You can also see from the comparison below that the camera appears to be applying both luminance and color noise reduction to JPEG images (to the detriment of image detail), it would be nice to have the option to control this from the parameters menu.

In RAW conversion terms the cleanest image came from Adobe Camera RAW with both luminance and color noise reduction enabled (at 25 each; out of 100) although this does mean some detail has been sacrificed. My personal choice would be Adobe Camera RAW's default setting of no luminance noise reduction but color noise reduction at level 25, this delivers the most 'film like' response (luminance grain with no color blotching) and also maintains image detail. I'd suggest that while DPP's selectable NR is a good first step the algorithm clearly needs tweaking, it should have more latitude for adjustment and should be available on the main edit window not hidden away in the preferences dialog.

Note: The following images are VERY LARGE please only download if you absolutely need to.

ISO 3200 (H) image noise reduction test (100% crops)

  • Details: ISO 3200 (H), 1/25 sec, F4.0 (EF-S 17-85 mm IS @ 22 mm), RAW+JPEG
JPEG from camera [4,794 KB]
DPP, No noise reduction - default [5,867 KB]
DPP, Luminance noise reduction (High) [4,955 KB]
DPP, Chrominance noise reduction (High) [5,718 KB]
DPP, Both Luminance and Chrominance noise reduction (High) [4,768 KB]
Adobe Camera RAW, No noise reduction [5,262 KB]
Adobe Camera RAW, Luminance noise reduction (25) [4,566 KB]
Adobe Camera RAW, Color noise reduction (25) - default [4,376 KB]
Adobe Camera RAW, Both Luminance (25) and Color (25) noise reduction [3,600 KB]
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Total comments: 2

The 30D had a 50 mm lens and the 5D had an 85mm lens and that could account for the difference in reading the globe etc.

marc petzold

Not really, the 5D is Fullframe, (x1.0 crop) whereas the 30D is Canon APS-C, and therefore with x1.6 crop - so the 50mm Lens behave itself like a 80mm lens compared to full frame, which is close to the 85mm Portrait focal lens onto the FF 5D.

Total comments: 2