Leica's reference wide-angle — the Summicron-M 28mm f/2 ASPH for M-mount rangefinder photography.
The Leica Summicron-M 28mm f/2 ASPH. is Leica's reference 28mm wide-angle for the M system. The Summicron designation indicates f/2 speed — the standard Leica aperture for general-purpose use. The aspherical element provides outstanding optical correction. At 28mm, it covers the classic wide-angle perspective beloved by street and documentary photographers.
Optical performance is outstanding. Sharpness is excellent from f/2 with the aspherical element providing edge-to-edge correction that is remarkable for a 28mm lens. Colour rendition has the Leica signature — neutral, precise, and with the micro-contrast that defines M-mount imaging. Vignetting is well-controlled for an M-mount wide-angle. Flare resistance is excellent.
Leica M mount with rangefinder coupling. Filter thread is 46mm (E46). Weight is approximately 260 grams — compact. Build quality is outstanding with precision German engineering. The 6-bit coding (on later versions) provides digital M body compatibility. The focus ring is smooth with accurate rangefinder coupling. A definitive M-mount wide-angle.
Available on the used market at significant but standard Leica pricing. Check rangefinder coupling and 6-bit coding status. The Summicron 28mm ASPH is widely regarded as one of Leica's finest wide-angle lenses. The aspherical correction sets it above the Summarit and Elmarit alternatives. A cornerstone lens for serious M-mount photographers.