(From Olympus lens literature) With a 25mm focal length and 47 degree angle of view, this lens sits right between wide and telephoto designs, making it a great choice as an all-around lens for your photography. A fast f1.8 circular aperture delivers beautifully soft defocused backgrounds for impressive portraits or when subject emphasis is the desired photographic effect. An inner focusing mechanism assures fast and accurate auto-focusing, and because it is an MSC design, it offers nearly silent focusing operation – a great feature when shooting HD movies.