As an ultra-speed standard lens for the LEICAFLEX, it is primarily intended for photography in poor light. This lens uses highly refractive glasses and is a 7-element symmetrical Gauss type. Coma - often a nuisance with high-speed lenses - is practically eliminated. The SUMMILUX-R is remarkably free from flare, so that even strong light sources in the picture itself cause neither ghost images nor loss of background detail. In addition, the largest aperture (a real f/1.4) offers special creative scope with selective focusing, i.e., restricted depth of field. With its outstanding overall definition in all distance ranges, this should become the preferred lens for sports, feature and available light photography. Image performance and contrast are exceptionally high at full aperture and further increase on stopping down to f/2 to 2.8.

As a standard focal length, it is a universal lens with the additional versatility of extreme maximum aperture. This is the fastest normal focal length LEICAFLEX lens available.

50mm summilux serial numbers