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The RX100's more powerful brother delivers even better photo quality.
Lori Grunin
I've been reviewing hardware and software, devising testing methodology and handed out buying advice for what seems like forever; I'm currently absorbed by computers and gaming hardware, but previously spent many years concentrating on cameras. I've also volunteered with a cat rescue for over 15 years doing adoptions, designing marketing materials, managing volunteers and, of course, photographing cats.
Noise and JPEG processing, higher ISO sensitivities
You can see artifacts at ISO 1600 in shadow areas (look at the text in the shadow under the bill), but properly illuminated areas still look pretty good.
You can start seeing a little mushiness in ISO 800 JPEG shots, but there isn't much you can do to clean them up in the raw file without exchanging softness for grain. You do gain back some detail using raw, though.
(1/40 sec, f3.2, center metering, AWB, ISO 800, 28mm)
Depending upon scene content, ISO 1600 can be quite usable. You can see some artifacts around the text edges and the texture of the pattern is lost in places, but it's still quite acceptable.
(1/60 sec, f3.5, center metering, AWB, ISO 1600, 28mm)
The tilting flash is invaluable for quickly controlling intensity and direction. On the left is the normal straight-on flash; on the right, flash tilted up.
(1/60 sec, f1.8, spot metering, AWB, ISO 1600, 28mm)