The Phase One Schneider 150mm LS f/2.8 is the fastest telephoto lens, providing razor thin depth of field at f/2.8 and beautiful out-of-focus bokeh. The lens features a Leaf Shutter capable of flash sync at 1/1000th of a second, perfect for studio and location portraiture alike. With its impressive large glass elements and robust metal barrel design, the Schneider Kreuznach 150mm LS f/2.8 AF IF Blue Ring lens radiates quality, not only for studio work but for every possible application.