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You can start seeing the edge artifacts from Sony's image processing in the shadow areas at ISO 800 (look at "pushed").
There's some detail loss in the out-of-focus areas at ISO 1600, and by ISO 3200 soft shadow areas show a lot of mushiness compared to the in-focus areas.
You can really see the difference between the sensors in the A7 and A7R.
Even at ISO 100, it's not exceptionally sharp, although you can do a little better with a higher-end lens. (This was shot with the 28-70mm kit lens.)
You get reasonable detail at ISO 400.
Sony's slightly aggressive processing results in edge artifacts as ISO sensitivity increases. That said, overall it's still pretty good.
This odd interference pattern in the blue channel resulted in yellow bands across the labels. It appears only in this shot, however.
While it's pretty soft at ISO 1600 -- and there may be a tiny bit of shake in this photo -- the A7 holds color saturation well.
The A7's algorithms do hold onto sharpness in the focused areas.
You can recover quite a bit of detail shooting raw.
While raw recovers a little detail at ISO 12800, the JPEGs are quite usable scaled down.
Sony's color reproduction at the default settings looks relatively neutral.
On its defaults, the A7 pushes the saturation a little bit but it doesn't overboost the contrast.