Compared to...

Studio scene comparison (RAW)

For a (more) level playing field for comparison we also shot our studio scene in RAW mode with each camera and converted it using Adobe Camera RAW. Because Adobe Camera RAW applies different levels of sharpening to different cameras (this confirmed) we had to use the following workflow for these conversions:

  • Load RAW file into Adobe Camera RAW (Auto mode disabled)
  • Set Sharpness to 0 (all other settings default)
  • Open file to Photoshop
  • Apply a Unsharp mask: 80%, Radius 1.0, Threshold 0
  • Save as a TIFF (for cropping) and as a JPEG quality 11 for download

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). Camera settings as per previous pages.

Sigma DP2 (RAW) vs. Olympus E-P1 (RAW)

Sigma DP2
Olympus E-P1
1.7 MB JPEG (2640 x 1760)
3.2 MB JPEG (4032 x 3024)

The Sigma's results are rather over-sharpened by our standard workflow because it includes a sharpening step to compensate for the low-pass/anti-aliasing filter (which the Sigma doesn't have). Even so, the level of detail being rendered is clearly very high and not dissimilar to that of a well-processed image from a camera with a 12mp conventional sensor such as the E-P1. Per-pixel sharpness on the DP2 is way ahead of the E-P1 and even in a large print it seems ulikely that the extra pixels on the Olympus sensor would give you any advantage.