D3X vs 5D2 - myth and reality

Started Jan 26, 2009 | Discussions thread
rhlpetrus Forum Pro • Posts: 25,859
Re: Why compare...

I think you're right about noise/banding, and the impression of noise in darker areas of 5DII's images is also not as good as with 1DsIII, even at low ISOs.

Thanks for calling attention to that (I think I was referring to DR differences, the subject of this thread, where 5DII and 1DsIII seem to be about same, at low ISO, and 5DII a little better as ISO goes up).

ejmartin wrote:

rhlpetrus wrote:

5DII is about same as 1DsIII at low ISO and a bit better at high ISO.
--

I'm not sure that's the case. The 5D2 uses the same sort of lower
grade of amplifier/ADC electronics as in the xxD series, with the
result that there is much more banding noise in the 5D2 than there is
in the 1 series. Banding noise is much more visually objectionable
than its contribution to the noise std deviation would indicate,
since it is coherent over multiple pixels along a line. Two cameras
with the same noise std dev can have different amounts of banding
noise which are subleading contributions to the overall read noise;
the one with the lower pattern noise will be judged visually to have
much lower noise in shadows even though as measured by the std dev
there is no difference. One can of course measure the banding
contribution separately but it is not typically done in reviews.

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Renato.
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