image noise

Auto ISO and flash on the Nikon D7000, D5100, D3100 etc.

Summary: Newer Nikon DSLR cameras seem to choose unnecessarily high ISO values when using a flash in combination with auto-ISO – specifically in “P”, “A” and “S” mode. I have verified this issue for the Nikon D7000 and the D3100, and from forums I deduce that it also goes for the D5000, D3000, D5100 and D300s.

Auto ISO on Nikon’s DSLRs has gotten confusing

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The Olympus PEN E-PL1 vs Nikon D3000 paradox

Petavoxel recently bemoaned the fact that the majority of sensors in recent micro four thirds EVIL cameras (or MILCs, if you prefer) perform poorly compared to contemporary APS-C sized sensors in digital SLRs. The only exception was the Panasonic GH1, which put up quite a respectable showing compared to its μ4/3 stablemates.

Yesterday dpreview posted their review of the E-PL1, and they were very happy with its high ISO performance. I quote:

Overall, the E-PL1’s images are the most natural and convincing here – avoiding the D3000’s overly contrasty, noisier images …  Most impressive is the E-PL1’s ability to produce results comparable with the EOS 500D and Pentax K-x, despite its smaller sensor.

But what does DXO Labs have to say? They disagree, showing that the big three leave the E-PL1 gasping for photons with a lowly 487  points in the low-light ISO stakes.

Hence, the paradox.

How do these two $500-ish cameras weigh up against each other?

How can this be? Is either DXO Labs or dpreview writing nonsense? The keen observer will notice that there are two significant differences in the way these two respected websites measure image quality:

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