The world is changing fast for Sigma Chief Executive Kazuto Yamaki.
The leader of the Japanese camera lens manufacturer has some successes on its hands, most notably the recent 35mm f1.4 DG lens that's brought new cachet to the Sigma brand. But at the same time, new contenders in the camera market have shattered the stable dominance of Canon and Nikon.
Camera makers old and new have begun jockeying for dominance in the chaotic world of small "mirrorless" models that bring interchangeable lenses to cameras much smaller than traditional SLRs. Contenders there include Sony, Fujifilm, Panasonic, … Read more