Leica Dg Vario-summilux 10-25mm / F1.7 Asph. H-X1025 is built for mirrorless Micro Four Thirds mount cameras and enables F1.7 aperture brightness throughout the entire 20-50mm (35mm camera equivalent) zoom range with exceptionally high optical performance clearing the stringent Leica standards. Suitable not only for photo shooting but also for video recording to satisfy both professional photographers and videographers. Comprising 17 elements in 12 groups, the lens system features three aspherical lenses and four Ed (Extra-low Dispersion) lenses that effectively suppress the axial chromatic aberration and chromatic aberration of magnification. Spherical aberration and distortion are also corrected by the aspherical lenses for stunningly high resolution. The use of aspherical lenses and the optimum design of the lens system results in a compact size and light weight despite its outstanding optical performance.