Ronkonkoma, NY—Sigma Corporation of America announced the newest addition to the Sigma Art line of lenses for full-frame cameras, the 24–105mm f/4 DG OS HSM. Although it is designed for full-frame cameras, it also works with APS-C sensors, giving an increase to focal length.
True to its categorization as a Sigma Art lens, the 24–105mm f/4 DG OS HSM is designed for artistic expression. The lens covers the basic shooting range from wide to medium tele with an inner focusing system that eliminates front lens rotation, enhancing its stability and allowing the use of circular polarizing filters. It also boasts a constant aperture of f/4 and contains Sigma’s proprietary Optical Stabilizer (OS) technology to compensate for camera shake.
Moreover, it was engineered to surpass the required quality inspection of every Global Vision lens with Sigma’s modulation transfer function (MTF) “A1” measuring system, to create a new optical standard to align with today’s high-spec cameras.
“For many years, Sigma users have been seeking a standard zoom lens in this range,” said Mark Amir-Hamzeh, president of Sigma Corporation of America. “The 24–105mm f/4 DG OS HSM is yet another example of Sigma listening to its users and delivering new and innovative products with the highest image quality.”
Amir-Hamzeh added that the new lens combines the largest possible fixed aperture to zoom ratio that will maintain optimal integrity for many kinds of photography, including landscapes, architecture, portraiture and still life. With a minimum focusing distance of 45cm and a maximum magnification ratio of 1:4.6, this lens is also geared for close-up photography.
Glass elements, including SLD, FLD, which is equal to fluorite, and glass-molded single- and double-sided aspheric lenses were included in its optical system to prevent aberration, field curvature, distortion and color aberration. The lens is also said to suppress chromatic aberration effectively at the telephoto end.
The lens’s Hyper Sonic Motor (HSM) is designed to ensure a silent, high-speed autofocus function, and it enables full-time manual focusing capability. The 24–105mm is also compatible with Sigma’s USB dock, which allows photographers to update its firmware and change focus parameters using Sigma’s Optimization Pro software. It is also compatible with Sigma’s recently announced Mount Conversion Service. $899. sigmaphoto.com
