With the 8-25mm f4 Pro, Olympus has successfully filled the gap between the two Leicas, starting as wide as one and ending as long as the other, but opting for a more modest f4 aperture to keep the size, weight and cost down. The retracting mechanism also allows the lens to shrink to a compact size without getting in the way of operation. The result is a lens that delivers a very flexible range from ultra-wide to standard coverage with useful close-up focusing and a compact size. Sure the f4 focal ratio on Micro Four Thirds means you won’t be enjoying shallow depth-of-field effects unless your subject is very close, but that’s about the only sacrifice to achieve what’s arguably one of the most compelling walkaround lenses in the system. If I had to choose just one lens for general use on a Micro Four Thirds body, the Olympus 8-25mm would be it, and it comes highly recommended.