Released October 2011. *Micro Four Thirds Lens. This telephoto motorized zoom lens offers smooth zoom operation with a constant overall length. Mount: Micro Four Thirds Mount. Focal Length: 45-175mm (35mm equivalent: 90-350mm). Maximum Aperture: f/4-5.6. Filter Diameter: 46mm. [HPS45175S] HPS45175S Released October 2011. This lens brings together proprietary optical technology to deliver superior imaging power and beautiful tonal gradations. It uses two "X Lens" ED lens elements to minimize chromatic aberration, while the use of aspherical lenses enhances contrast performance. The nano-level microstructure of the thin-film lens surface dramatically reduces light reflection across the entire visible spectrum (380-780nm). This significantly reduces ghosting and flare, resulting in sharp, clear images. The world's first* electric zoom allows you to zoom while holding the camera body or lens barrel securely. The multi-speed zoom allows you to adjust the zoom speed while zooming. This reduces image shake, which can easily occur during video recording. Achieves both high performance and compactness. This slim telephoto zoom lens features a fixed overall length of 90mm and an outer diameter of just 61.6mm. It features the world's first* "multi-actuator floating inner focus" technology, which improves image flatness. Furthermore, the strategic placement of two aspherical lenses and two ED lens elements achieves both high performance and compactness. (As of August 26, 2011) Specifications: Lens construction: 14 elements in 10 groups (2 aspherical lenses, 2 ED lenses) Nano Surface Coating: Yes Mount: Micro Four Thirds mount/metal mount Angle of view/focal length: W (f=45mm): 27° - T (f=175mm): 7.1°/45-175mm (35mm equivalent: 90-350mm) Optical image stabilization: Yes Maximum aperture/minimum aperture: F4.0 (W) - F5.6 (T)/F22 Aperture type: 7-blade circular iris diaphragm Maximum magnification: 0.2x (35mm equivalent: 0.4x) Filter diameter: 46mm Maximum diameter x length (from tip to lens mount reference plane): 61.6mm (fixed hood) x approx. 90.0mm Weight: approx. 210g *Micro Four Thirds lens Manufacturer's warranty period: 1 year