Buy Samsung EX-W20NB 20mm F/2.8 Lens. Samsung's 20mm F/2.8 Lens for NX10 / NX100 is a small (1" deep with a 2.44" diameter), lightweight (3.13 oz/89 g) "pancake" lens, equivalent to 30.2mm in the 35mm format, designed for the NX10 & NX100 cameras. It ha