Olympus Zuiko 14-35mm f/2.0 Digital ED SWD Lens for Olympus Digital SLR Cameras
The Zuiko Digital ED 14-35mm f2.0 SWD lens (equivalent to 28mm to 70mm) is the world’s first standard zoom lens to feature a large f2.0 aperture. Boasting industry-leading imaging performance, this lens is a worthy addition to the Olympus Super High Grade (SHG) series of lenses. Together with the ED 7-14mm f4.0, ED 35-100mm f2.0 and ED 90-250mm f2.8 lenses, this lens completes Olympus’ series of professional zoom lenses with fixed F-values.The flagship of the Zuiko Digital series, this lens was developed to meet the requirements of the most demanding professionals. It includes reliable splash- and dust-proofing, Olympus’ exclusive SWD-driven ultra-fast AF system, a mechanically interlocked manual focusing mechanism and a large, flower-shaped hood with a polarization filter control window.With its unique f2.0 aperture providing bright viewing with a sharp subject and a soft blurring of the background, this lens epitomizes the versatility, power and creative freedom made possible by the Four Thirds System and is ideal for almost any application -- from landscapes and portraits to indoor shooting and photojournalism.About Supersonic Wave Drive TechnologyOlympus-proprietary SWD technology has enabled an ultra-fast, whisper-quiet, high-precision AF system. Two compact, high-powered Supersonic Wave Drive devices power autofocus at an ultra-high speed by exciting unique elliptical oscillations, while an ultra-compact 5.3mm x 4.3mm optical encoder detects and controls the lens drive position using direct rotation detection without reduction gear. This  enables it to achieve a level of precision that’s accurate to 5 microns (5/1000 mm). When used in combination with the new E-3, which offers improved AF computation and lens-body communication rates, the SWD motors provide the fastest focusing speed of approximately 170 ms (0.17 seconds).