Compared to...

Studio scene comparison (RAW)

This is our standard studio scene comparison shot taken from exactly the same tripod position. Lighting: daylight simulation, >98% CRI. Crops are 100%. Ambient temperature was approximately 22°C (~72°F).

Olympus E-P1 (RAW) vs. Canon EOS 500D (RAW)

Olympus E-P1	Canon EOS 500D
8.9 MB JPEG (4032 x 3024)	4.2 MB JPEG (4752 x 3168)

Here we compare the output from both cameras processed using Adobe Camera Raw. Despite our remaining reservatiosn about the way ACR handles the Olympus files, the E-P1 comes pretty close to matching the 500D's resolution despite the megapixel gap. Impressive stuff.