alundeb wrote: thedigitalbean wrote: Dawei Ye wrote:
^ I agree, I did a test of the 7D vs 5D2 last night for shadow noise, the 5D2 was about 1 stop better based on JPGs, I used RAW but unfortunately I can\'t open the RAW files at the moment.
If the 1 stop advantage is correct in RAW, then it means that at the pixel level the 7D is noiser than the 40D (which is only 0.67 stops worse than the 5D2) and similar to the 50D.
Imo downsizing the 7D file is not going to equal things, because the issue with the newer Canon cameras (including the 5D2) is chroma blotching. That blotching is still there even if you downsize to 10 or even 5MP. And YES it does show up in prints...badly...
At the risk of repeating of myself, I\'ll say that comparing the RAW files, the 5D2 is definitely NOT 1 stop better than the 7D, I put the 5D2\'s advantage at between 1/3 to 2/3 stop. Furthermore, the 7D has visibly lower noise than the 50D at all ISOs 800 and higher.
Sounds too good to be true
Did you also notice that the 7D exposures were different, so we are effectively comparing the 7D at ISO640 to the 5DII at ISO800 here?
To be fair, we should subtract 1/3 stop from the 7D\'s noise performance, at similar shutter speeds.
I would say from image examples, the 5D2 is at LEAST 1 stop better than the 7D for high ISO noise. My 1DMkIII is about about 1-2 stops better than the 7D, and about 1/2 stop better than the 5D2. I\'ve posted a few comparisons, and can post more. ISO3200 coming from my MkIII is much cleaner than ISO1600 from the 7D (even when the 7D has be resized to 10MP). The 5D2 is much closer to the MkIII than the 7D.
Sep 10, 2009 at 04:02 PM
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