Alongside the new OM-D E-M1, Olympus has released the new ED 12-40mm f/2.8 PRO lens in Micro Four Thirds mount. Thanks to the 2x crop factor of Micro Four Thirds sensors, the lens offers a 24-80mm equivalent field of view.
Like the Olympus E-M1, the 12-40mm f/2.8 lens offers weather-sealing for durability in the elements. It features a 7-blade circular aperture for pleasant bokeh. The Olympus ED 12-40mm f/2.8 PRO lens retails for $999. Check it out here at B&H Photo.