The Noctilux-M 75mm f/1.25 ASPH is the most expensive lens that Leica currently produce, but it also offers the shallowest depth of field, making it perfect for portraiture. Read our in-depth Leica Noctilux-M 75mm f/1.25 ASPH review, complete with full-size sample images, to find out exactly what $12,795 / £10,250 buys you...