Sigma lenses are manufactured in Aizu, Japan. Almost every component, from tiny screws to large diameter front elements are made in-house. Aizu is 300 km north of Tokyo: two hours by high speed Shinkansen and then a scenic hour on a local railway. The train winds through high mountain passes and follows the foot of 5,968′ high Mt. Bandai. It looks like Sun Valley (3′ shorter) rising above jade-green rice… read more…