The Sigma 120-300mm F2.8 EX DG OS APO HSM |S is a unique lens in the photo industry. Its design is based around high speed superior optical performance. Created for Full Frame sensors, it may also be used with APS-C sized sensors as well. It has an array of technology to guarantee the highest level of image quality. This technology includes a Hyper Sonic Motor (HSM), an Optical Stabilizer, Inner Focusing and Zooming System, SLD and FLD Glass Elements (FLD has a performance equal to fluorite).

The HSM ensures quiet, high speed, accurate autofocusing while the OS allows for use of shutter speeds approximately 4 stops slower than would otherwise be possible. Super Multi-Layer coating reduces flare and ghosting working together with the SLD and FLD glass elements for maximum correction of chromatic aberrations. An inner focusing and zooming system produces sharper images throughout the entire zoom range. With a large fixed aperture of F2.8 the 120-300 is capable of handling any lighting scenario.

Lens Construction 23 Elements in 18 Groups

Angle of View 20.4-8.2 degrees

Number of Diaphragm Blades 9

Mininum Aperture f22

Minimum Focusing Distance 150-250cm cm / 59.1-98.4in in

Filter Size (mm) 105mm

Maximum Magnifications 1:8.1 (at 200mm focal length)

Dimensions

(Diameter x Length) 114.4mm x 289.2mm mm/4.5in. x 11.4in. in

Weight 2950g / 104oz.