I have always respected Sigma's innovation and integrity. Many times they surpass the big guys and show us how it can be done. Sigma Corporation develops world's first F1.8 constant aperture zoom lens New 18-35mm F1.8 DC HSM features Global Vision Art lens design RONKONKOMA, NY, Apr. 18, 2013 — Sigma Corporation of America ( www.sigmaphoto.com ), a leading researcher, developer, manufacturer and service provider for some of the world's most impressive lines of lenses, cameras and flashes, today announced the Sigma 18-35mm F1.8 DC HSM Art lens, the market’s first zoom lens to achieve a maximum aperture F1.8 throughout the entire zoom range. This revolutionary, wide aperture, standard zoom lens is created for DSLR cameras with APS-C size sensors, which translates to a focal range of 27-52.5mm on a 35mm camera. With a minimum focusing distance of 11 inches, and a maximum magnification ratio of 1:4.3, the 18-35mm is ideal for landscapes, portraits, sti...