In addition to the M-Monochrom, Leica has announced the debut of the X2, an APS-C compact camera with a fixed 24mm Leica Elmarit f/2.8 ASPH lens. An updated version of the X1, the camera’s biggest improvements take the form of a 16.2-megapixel CMOS sensor — a size typically found in DSLR shooters — and the addition of an accessory socket for a 1.44MP…