The Schneider Kreuznach 55mm LS f/2.8 is a semi wide lens designed for Phase One medium format cameras that is perfect for portrait and lifestyle photography with little depth of field. It resembles an 34mm on classic 35mm photography. The lens is very sharp and has almost no distortion. Thanks to the leaf shutter there is little distortion and it is possible to achieve a flash sync of 1/1600. 

Furthermore, the lens is composed of 7 elements in 6 groups, and has a minimum focusing distance of 45 cm. 

The dimensions of the lens are 77,6 x 86,5 mm and it weighs 660g.