From DXOMark: More pixels offsets noise3

Started May 30, 2009 | Discussions thread
John Sheehy Forum Pro • Posts: 21,582
Re: Just did another check...

photo nuts wrote:

Sorry for the previous confusion...

This time, I compare the Canon 20D against the Nikon D70 and D200:

http://www.dxomark.com/index.php/eng/Image-Quality-Database/Compare-cameras/ (appareil1) 178|0 (appareil2) 197|0 (appareil3) 203|0 (onglet) 0 (brand) Canon (brand2) Nikon (brand3) Nikon

All across the board from SNR18%, dynamic range, tonal range to color
sensitivity, the 20D is as good as, if not SIGNIFICANTLY better than
the D200! The comparison is done in both pixel and image level.

Why then does the Nikon D200 sensor obtain a HIGHER DXOMark sensor
score than the 20D???

Is DXOMark really being honest here?

Most people consider their composite scores of minimal value.

The biggest differences between sensors of the same size are in read noise; their composite scores don't weigh that in too heavily.

18% SNR at pushes to ISO 10,000, for example, might be more differentiating than the ISOs they do it at. 0.25% SNR at the normal ranges, too.

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John

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tko
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