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#41
July 14th 04, 09:32 PM
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EOS 10D and 1D Mark II
We are talking about different charts. I'm talking about the one at the
BOTTOM of http://www.dpreview.com/reviews/sigmasd10/page13.asp Richard "Georgette Preddy" wrote in message m... "marlin" wrote in message . .. "Georgette Preddy" wrote in message Nothing changes. The graphed charts are simple standard deviation depictions. Canon's aggressive NR just smears noise into lower frequency blobs, this lowers standard dev after the shutter closes, but more importantly it dramatically lowers the purity of the signal. Let's forget about noise for a second. Not easy when that is the point of the chart. Do you not see that the colors also go way off? No. The Canon images aren't even gray anymore at high ISOs, they're distinctly purple/green... http://www.pbase.com/image/31155134/original And Canon color rendition is consistently too red, you can see it here too, the Foveon colors are closer... http://www.pbase.com/canon10d_sigmasd9 ...but how could they not be more accurate when Foveon colors are actually sensed? 
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#42
July 14th 04, 09:32 PM
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EOS 10D and 1D Mark II
We are talking about different charts. I'm talking about the one at the
BOTTOM of http://www.dpreview.com/reviews/sigmasd10/page13.asp Richard "Georgette Preddy" wrote in message m... "marlin" wrote in message . .. "Georgette Preddy" wrote in message Nothing changes. The graphed charts are simple standard deviation depictions. Canon's aggressive NR just smears noise into lower frequency blobs, this lowers standard dev after the shutter closes, but more importantly it dramatically lowers the purity of the signal. Let's forget about noise for a second. Not easy when that is the point of the chart. Do you not see that the colors also go way off? No. The Canon images aren't even gray anymore at high ISOs, they're distinctly purple/green... http://www.pbase.com/image/31155134/original And Canon color rendition is consistently too red, you can see it here too, the Foveon colors are closer... http://www.pbase.com/canon10d_sigmasd9 ...but how could they not be more accurate when Foveon colors are actually sensed?
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