The lens consists of 9 elements in 7 groups, and uses 3 aspherical elements. The aspherical lenses suppress spherical aberration and distortion effectively while realising a small, compact lens design.
The inclusion of a newly designed stepping down motor makes the focussing action smooth and silent, for use both in photo and video recording. When mounted on a Lumix G body, you can take full advantage of the high-speed, high precision Contrast AF system, if your camera supports Contrast AF.
The Leica Summilux 15mm f/1.7 comes with an AF/MF switch and aperture ring for smooth, intuitive operation.
The metal design, including the hood and lens mount gives a high quality and durable finish, worthy of its Leica branding.
Using Panasonic's Nano Surface technology on the front element, reflection is dramatically minimised, resulting in a super-clear picture and dramatic reduction in both ghosting and flare.