TOKINA CO., LTD. A 50-year leading company on converter lenses for the 35mm single-lens reflex camera.
		HOYA CORPORATION (Home Page) Holds 40% of the share throughout the world on all production of optical glasses. Within this field of optical glasses, Hoya is exceptionally featured, without comparison to any other competitors. It supplies its glass to most of the renown optical manufacturers around the world and holds the number one share of camera filters in the world.
		KENKO CO., LTD. A comprehensive optical manufacturer, which handles everything from binoculars and microscopes to all camera products. It supplies one of the world's leading production especially on binoculars. In the field of camera products and telescopes, it holds the number one share in Japan.
		SLIK A legacy brand of quality camera support systems with a 50 year record of innovation and performance. SLIK has received 6 prestigious Japanese Ministry of Trade and Industry "Good Design" (G-Mark) awards. SLIK's original and innovative designs have been copied so many times that some of their ideas have become today's industry standards.