The Leica Summicron-M 28mm f/2 ASPH. is now in its third generation, and this latest version brings one of the M system’s most versatile focal lengths firmly into the modern era. Combining a fast f/2 aperture, a compact aspherical design, an integrated hood, and a new 0.4m close-focusing distance, it promises classic Leica handling with greater flexibility than ever before. I tested it on the new Leica M EV1 to see whether this £4,700 / $6,000 l…