The voigtlander 28mm f2 vm ultron lens is a compact wide angle lens designed for use with leica m mount cameras its fast f2 aperture makes it ideal for shooting in low light or with a shallow depth of field and its 10 blade aperture diaphragm delivers beautiful bokeh in out of focus areas this high quality all metal lens features 10 elements in 8 groups and a minimum focus distance of 07m