The new Leica DG Vario-Summilux F1.7 / 10-25mm ASPH. It fully exploits the potential of the Micro-FourThirds standard by allowing large wide-angle shots despite its high light output while remaining unusually compact. It has exceptionally high imaging performance in the entire zoom range of 20-50mm (35-mm KB) and is suitable for a variety of daily shooting situations from dynamic landscapes to portraits. With its consistently high F1.7 light level, the Leica lens enables a high level of freedom and effortless low-light shots, as well as a fantastic bokeh with nine shutter blades. The lens system consists of 17 elements in 12 groups and features three aspherical lenses and four extra-low dispersion (ED) lenses that effectively suppress axial chromatic aberration and chromatic aberration of magnification. The use of aspherical lenses and the optimal design of the lens system result in a compact size and low weight with excellent optical performance. The new lens is also particularly recommended for video recordings. It is compatible with the high-speed precision contrast AF system of the current LUMIX G cameras with a data exchange up to a maximum of 240 B / s. The Leica DG Vario-Summilux is F1.7 / 10-25mm ASPH. equipped with a click-free aperture ring that allows direct, even control of the aperture. The lens also has a focus-clutch mechanism that allows adjustment of the focus ring between two positions, one with and one without focus distance. This allows fast AF / MF changes and ensures intuitive operation. The Leica DG Vario-Summilux F1.7 / 10-25mm ASPH. This is also convincing for video recordings because it effectively reduces the effect of Focus Breathing. Thanks to its robust, dust and splash-proof design, the lens can also be used in harsh weather conditions down to -10 degrees.