Funny how memories are so different about recent history...
Ray, if I am recalling the thread over on RG correctly, another poster proved with image crops that the 1Ds2 revealed more detail than the 5D. I claimed the detail difference shown -- mostly detail in distant trees as I recall -- would be revealed in a GOOD print. I don't recall using the word professional, though I did offer to have anybody stop by my studio and we would do the comparison and make prints on my system. FWIW, nobody took me up on that. As I recall, you were one of the lone voices that claimed it was an insignificant difference IN YOUR OPINION. Micheal, Bill and Charlie showed it again in their mega-comparison, but again in your opinion they failed. In my opinion they did a stellar job with as near to ideal capture conditions as possible. So I do agree with you when you claim "most arguments seemed to revolve around personal prejudice and bias" ...
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Now that that's out of the way, back to the topics at hand. First, I've never heard of the skin-tone issue either and never had them with my 1Ds2 -- sounds like processing issues Edmund. Color was not as good out of the box for skin unless you had a good profile or calibration, but that is a separate factor. As for direct comparisons, Uwe and I did an INFORMAL shoot with the 5D, 1D3 and new Fuji. You can DL the raw files and process to your heart's content here:
http://www.outbackphoto.com/reviews/equipm.../1d3_5D_S5.html. The image on the 5D is slightly larger as is the sensor, so this required us to use a different zoom setting on the 24-105 with each camera, a choice of lens and usage factor that will eliminate the comparison as flawed from the purists in the group, so if this is you, read no further...
My short conclusion regarding the 1D3 and 5D is that they are essentially equal as respects image detail. With my current processing which is refined and includes a custom calibration for the 5D, and not at all practiced with the 1D3, the 5D showed more shadow detail. IMO with perfected processing, each is essentially going to be the same on detail, color and DR. Live view is a very cool feature -- with the magnification, you can live focus on the LCD just like a view camera. The added benefit is the mirror is already up for taking the image -- so yes, we finally have one-button mirror up, though indirectly. Speed is stunning, and practically a joke for my limited needs, but sports shooters are sure to relish it -- it is essentially 10MP-per-frame movie capture. The 5D is lighter and smaller than the 1D3, though the 1D3 is notably lighter than previous 1 cameras. Ergos are great with either if you are used to and already like Canon ergos. The 1D3 has added some bracketing refinements, so now it's easier to shoot a series for HDR blending with a single shutter press, another nifty feature. Individual lens autofocus calibration is a huge new feature, and the promise of no more sensor dust could be huge if it really works. Personally, I don't need the speed, don't have to have live preview and am not bothered by having to manually execute a series of exposures when I need an HDR set, AND my 5D's are already paid for, so for now I see little reason for me to upgrade. If I were buying new, the 1D3 would probably get the nod for its added features and 1-series durability.
Cheers,