It's a new cutting-edge interchangeable lens LUMIX G X VARIO PZ 14-42mm/F3.5-5.6 ASPH./POWER O.I.S. with electric-powered zoom operation from the new premium lens brand “X” for LUMIX G Micro System that complies with 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 achieving the downsizing of lens unit also improves optical performance by minimizing distortion, even at the 28 mm wide end. The 2 ED lenses effectively compensates for the chromatic aberration. And, the retractable-type zoom lens boasts outstanding compactness with approx. 26.8 mm** in length and approx. 95g in weight to realize ultra-high mobility.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..*****For a digital interchangeable lens as of August 26, 2011./ ** When the lens is retracted./ ***The time for focusing on the subject is measured with the DMC-GF3 to move the lens position to &quot&quot2m&quot&quot from &quot&quotinfinity&quot&quot position at wide-end. Panasonic measurement method.*5/ ****Measured with DMC-GF3. The time required to start exposure after the shutter button is fully pressed after the lens position is moved from “infinity” to “2m”. The zoom position is at wide-end.*5/ *5 The firmware of the GF3 must be updated to Ver.1.1 or later. Panasonic measurement method