By Gerry Shih SAN FRANCISCO (Reuters) – In 2011, Lytro Inc dazzled the consumer gadget world when it introduced a pocket flashlight-sized gizmo that could take “living” pictures – images that could be refocused after the shutter clicked. The Lytro Illum, priced at $1,599, is marketed as a legitimate tool for commercial photographers and advanced amateurs who want to differentiate their work in an age of Instagram and “commodotized imaging,” Lytro founder Ren Ng said. The original camera, which was priced at $399, was mostly a niche product that sought to prove the viability of light-field photography. Unlike the original Lytro camera, however, the Illum resembles a traditional DSLR, featuring a 30- to 250-mm equivalent F/2 lens, a 1-inch sensor and a sleek black body with a shutter button, SD memory cards and a 4-inch touchscreen display.