unfocused said:
I'm curious about this as well. I'm not sure I want to pop for another piece of software, especially since I haven't found Lightroom to be all that beneficial over Photoshop (both use the same RAW processing, just different interfaces) Can someone who has used both please quantify what, if any, advantages other RAW processing software might have over Photoshop? (I'm not talking about image editing, I'm talking about RAW processing and some concrete examples would be helpful)
Great question - and one that gives me an excuse for a simple test.
I expect the primary difference in RAW converters is how they handle noise and color, and secondarily, how they handle lens corrections. For example, one reason I prefer DxO to ACR is that the former bases the lens corrections (distortion, vignetting, etc.) on controlled lab testing, whereas ACR's lens profiles are sometimes based on user-submitted results (subject to variation in lighting, etc.).
For a comparison, I picked a test image with a fair bit of noise - an ISO 3200 shot from the 7D. This shot simulated real-world high-ISO use, i.e. I used ND filters to reduce the illumination, rather than a fast shutter speed in bright light (as is commonly used in ISO noise testing, and results in lower read noise that isn't necessarily reflective of real-world shots). Shot was with the 7D and EF 70-200mm f/2.8
L IS II @ 85mm, 1/60 s, f/5.6.
The same RAW image was converted to JPG with Canon's own DPP, DxO Optics Pro, Adobe Camera RAW (in CS5), and Apple Aperture 3. The appropriate camera and lens correction modules were used where available as part of the converter (i.e. all except Aperture 3, where you need a separate plugin).
Unfortunately, different RAW converters use different algorithms and the relative settings mean different things in different programs - so, there's really no way to meaningfully compare across settings. The approach I took was to assume that the developers of the software know their software best, and chose default settings optimal for the camera and ISO setting - obviously, they're going to be biased to what the developers think a good image looks like, but at least it's a baseline for comparison. For DPP default, I used the Standard Picture Style (the 'no adjustment' image used Neutral).
Here's what the output looks like (click for larger, up to 1600 pixels with View All Sizes, which when viewed at full size are 100% crops):
Personally, my order of preference is DxO > DPP > Aperture > Adobe Camera RAW. ACR looks grainy and oversaturated to me, and with Aperture the contrast is on the low side. Again, these are just the default settings - with specific, image-dependent adjustments better results are certainly possible with any of the packages.