Testing my GH2's sensor

Started Feb 20, 2011 | Discussions thread
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bg2b OP
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Re: Testing my GH2's sensor
In reply to _vlad, Feb 22, 2011

If the RAW files are being massaged, then all bets are off. In the compare experiment I showed in a post below ( http://forums.dpreview.com/forums/read.asp?forum=1041&message=37799085 ), I looked more closely at ISO 640 and ISO 2500 histograms. There's definitely something a little funny in the latter. There seem to be some unexpected additional gaps in the 2500 histogram, and it also looks a little smoother than I expected. The gaps might possibly be due to the way the lossy RW2 compression works. But I can't understand the smoothing. Or maybe it's that the 640 histogram is rougher than expected? Who knows...

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