Pristine Primes: M.Zuiko prime lenses feature fixed focal lengths ranging from the 12mm F1.8 lens that's optimized for landscapes to the 75mm F1.8, a perfect portrait lens. Quiet Autofocus: The inclusion of the Movie & Still Compatible (MSC) mechanism provides amazingly fast - and nearly silent - autofocus operation. Exquisite Quality: With ten individual lens elements in nine groups, metallic construction and a light weight of just 10.7 oz, this lens is a really advanced piece of engineering. Beautiful Bokeh: Photographers who shoot a lot of portraits and still-lives are always seeking excellent bokeh. Thanks to its large f1.8 aperture and 9 bladecircular aperture, the 75mm f1.8 is especially well suited to capture the combination of a tack-sharp subject and beautifully soft, defocused background that exemplifies bokeh.