the first quantifiable review of the new 17mm Olympus and it is exactly what we expected: overpriced and underperforming. Actually, the data exceed the subjective tests in condemning the lens. Distortion is as high as I predicted, hitting nearly 6%. Vignetting is not extreme, but it's nowhere near good. Chromatic aberrations are terrible. Basically, everything is far worse than the 20mm. Even bokeh on the 20mm is better, although that's subjective.
Only a maniac would buy this lens.