Sony vs Sigma blue and gray resolution measurements

Started May 14, 2014 | Discussions thread
Roland Karlsson Forum Pro • Posts: 27,663
Re: Per pixel? Per image?

docmaas wrote:

FF or aps-c on A7r is irrelevant because the pixels don't change size. The only thing that changes are the 2d dimensions. The center section and the target will be exactly the same size regardless of the setting on the camera.

It's an indicator of how well similar size pixels (4.9 micron sigma and 5 micron sony) resolve. It's particularly interesting because the a7r has no aa filter so we can see what the absence of the aa filter does for the bayer image. Of course a Nikon D800 (not D800e) in the mix would make things even more intersesting but incompatible mounts make that very difficult.

The whole point is see how much difference there is in resolution. You do need to read the links I posted to get informed as to the theory behind the experiments.

And ... we already know that, given the same amount of MP, the Foveon will resolve more. And we already know that an AA less camera, with a sharp enough lens, will have color artefacts when doing aliasing.

Nice to get it quantified though.

 Roland Karlsson's gear list:Roland Karlsson's gear list
Sigma DP3 Merrill Sigma dp2 Quattro Sony RX100 III Pentax K-3 Pentax K-1 +14 more
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