BEST dynamic range at ISO X at YOUR dslr?!

Started May 18, 2010 | Discussions thread
krikman
Regular MemberPosts: 292
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Re: Dynamic range at ISO X at MY DSLR
In reply to milt95033, Jun 7, 2010

The D90 "magic" dynamic range is fancy urban legend dependent on measure method.
The method as on DXO site is based on SNR value.

I.E. if we'd found a way to blend pixels at hardware level we can make any dynamic range. The cost is picture clarity and sharpness.

Because DR is a brightest highlights/deepest shadows ratio with predefined SNR.

As a long time D90 user I can confirm that D90 RAW files looks as they were noise reduction already applied, smoothed and blurred. And expect no tiny details. D300 is much better.

And for topic question:
The base ISO is not so perfectly calculated.

In case of D90 the best DR achieved at ISO Lo-1 (1/3 stop) or ISO160 as marked in EXIF.
Same seems for my D300s.

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