The Olympus M.Zuiko DIGITAL ED 40-150mm 4-5.6 R MSC may not be the hottest lens around in terms of generated excitement. However, it is certainly one of the most sold lenses of the micro-four-thirds (MFT) system - simply due to the fact that it is usually sold as part of camera-lens kits (either with a black or silver color finish). Given its specs it is a mid-range tele zoom lens suitable for a variety applications such as basic wildlife or portrait photography. The "R" model is an improved version of the initial 40-150mm - if you count in the Four-Thirds variants this is even the 4th incarnation.