E-M5 has DR 13!

Started Apr 13, 2012 | Discussions thread
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UnderDriven
UnderDriven Senior Member • Posts: 1,069
Re: hard to get 13 bits of DR from 12-bit RAW files [n/t]

DxOMark can indicate higher values than the number of bits in the RAW file if you use the "Print" tab, due to the scaling of the image to 8MP (scaling reduces noise and their DR value is based on the noise floor). If you use the "Screen" tab you should get an absolute reading. For example, when using the "Print" tab the Sony A55 has a DR of 12.39 which exceeds the 12-bit RAW format. However, if you use the "Screen" tab the DR is 11.88. At least that is one possible explanation I can come up with...

Cheers, Keith
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http://www.kotay.net/keith/photo/photo.shtml

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