It's a cutting-edge interchangeable lens with electric-powered zoom operation from the premium lens brand for LUMIX G Microsystem. Crystallizing Panasonic's optical technologies, the premium lens 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.It achieves high descriptive performance for resolution and contrast at entire zoom range 45-175mm without changing the overall length. In addition, the lens system features the inclusion of 2 ED lenses, which suppress chromatic aberration, contributing to high descriptive performance at entire zoom range.Panasonic's Nano Surface Coating technology is adopted to minimize the reflection at entire visual light range 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 light speed AF. By speeding up the aperture control, shutter time lag is also shortened.