I saw this on the sony forum. But it is broad enough for all forums. I am reposting the link for discussion here.
The test redefines dynamic range to useable dynamic range rather than 1:1 and concludes the a7rii sony sensor is still superior in dynamic range to the 5dsr. A7r is closer above iso 400.
I like the fact that the test does not use the unusable 1:1 range of dxomark.
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Based on these measures
it looks like the dynamic range advantage of canon over iso 800 has gone away and the a7rii has 1/2 stop advantage over 5dsr.
it also looks like a7rii is better at > iso 800 than the a7r. And I have always wondered whether the comparison is linear and reflected in a more reasonable test than dxomark.
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Some interesting questions that arise to me:
1) My view is that the a7rii (best Iso landscape camera in low ISO) is still too low and needs HDR. The redefining of dynamic range to 20% snr is a better test and supports that conclusion. Eg if you need lots of dynamic range - use HDR or blending. Of course if something is moving you cannot do this, so more dynamic range is good barring all other factors but the a7rii dynamic range is still not enough for me.
2) The a7r has an apparent boosting at some ISO\'s. It appears that sony is doing some processing of the results to achieve their dynamic range gains above base ISO. This may be why they don\'t provide raw raw\'s because they cook them first? The question I have is - you could do the same with the raws of canon for example to match the higher dynamic range.
3) The related question is does such processing decrease something other than dynamic range (usually there is some trade off) like color, iq, ....
Scott
p.s. the purpose of this post is not to re-re-re start the debate on which camera is better. There is more to a camera than dynamic range capability. Like the ability to us my ts17 that does not exist natively in sony or nikon. I just wanted to understand what sony is up to - to see if it can be achieved by canon in post processing.
Aug 14, 2015 at 02:24 PM
Previous versions of Scott Stoness's message #13150478 « Interesting Reference Data on Dynamic Range - 5dsr »
