There are a few select companies that make Rangefinder lenses that fit onto rangefinder cameras with an adapter or without. Leica rangefinder lenses are probabaly the most well known, but Zeiss Rangefinder lenses and Voightlaner Rangefinder Lenses are also high quality. Some rangefinder lenses will fit onto a DSLR with an adapter and are very compact. Rangefinder film camera lenses can be bought secondhand and rangefinder digital lenses are easily available from stock.