| http://www.w3.org/ns/prov#value | - That measurement is performed at image center, what happens in the field is a different measurement, available on www.dxomark.com as ???vignetting???.Mark DubovoyMark,I would have at least two concerns with that:Firstly, using that procedure, DxO would have to have tested a large number of samples of each individual camera, else all you are looking at is sample to sample variation.Secondly, I think the
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