MS Optics ISM 50 mm F/1.0 M Mount Lens Leica, This is probably one of the most extraordinary lenses available for Leica, very tiny yet providing f1.0 aperture. It is handmade by Miyazaki Sadayasu. Google it, is very unique rendering, soft wide open like first noctilux. It is very unique rendering, really extraordinary photo rendering. Is very limited run my is number 25.