Designed specifically for the Four Thirds SLR system, the Olympus 14-54mm has a useful effective zoom range of 28-108mm. Better still, as one of the 'pro' level lenses in the Zuiko Digital line-up, build quality feels consummately sturdy, and the lens features dust and moisture seals, including a rubber o-ring incorporated into the metal mounting plate. It's similar to the arrangement that Canon uses on most of its L-series (Luxury) lenses.



Link: Techradar