Olympus 50mm f/2.0 Telephoto Macro ED Lens for E1, E300 & E500 Digital SLR Cameras

.Olympus Zuiko Digital 50mm F2.0 macro lens: Review from dpreview.com

The Olympus Zuiko Digital 50mm F2.0 Macro is a lens which we've held in high regard ever since we started using it for our reviews of Four Thirds camera bodies, and subjecting it to our full optical test suite shows precisely why. Certainly in terms of the studio results, it's the nearest we've yet found to a technically perfect lens (although it's important to appreciate that we haven't yet tested any comparable short tele macros for other formats). It's impressively sharp right across the frame even wide open, shows no significant lateral chromatic aberration or vignetting, and is near-perfectly corrected for distortion.