The LUMIX G X VARIO PZ 45-175mm ASPH./POWER O.I.S.interchangeable lens with electric-powered zoom operation complies with the Micro Four Thirds System standard. Crystallizing Panasonic’s optical technologies, new premium lens brand “X” features superb image rendering for lifelike textures, crisp edge-to-edge contrast, a unique Nano Surface Coating for minimal ghosts and flaring and natural atmospheres with remarkable transparency. Comprising of 9 lenses in 8 groups, the lens system features excellent contrast at entire zoom range. The inclusion of 4 aspherical lenses that helps achieve the downsizing of the lens unit also improves optical performance by minimizing distortion, even at the 28 mm wide end. The 2 ED lenses effectively compensate for the chromatic aberration. Panasonic’s Nano Surface Coating technology is adopted to minimize the reflection at entire visual light range (380nm-780nm) by applying the extra-low refractive index coating with nano-sized structure on the surface of the lens. It results in the super clear image with dramatic reduction of ghost and flare. Adopting an inner focus system driven by a stepping motor, the superior optical design realizes outstanding smoothness to support the high speed AF system of LUMIX G cameras. It achieves approx. 0.1 second Light Speed AF thanks to the downsizing of focus lens and its amount of movement. By speeding up the aperture control, shutter time lag is also shortened by approx. 40% compared with the LUMIX G VARIO 14-42mm/F3.5-5.6 ASPH. /MEGA O.I.S.