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Sigma APO 120-300mm F2.8 EX IF HSM unveiled - A new telephoto zoom lens, which retains a constant fast aperture of F2.8 at all focal lengths.
Whilst Sigma's Digital Division has been busy developing the ground breaking SD-9 digital SLR, their analogue design team has been busy burning the midnight oil.
120-300mm F2.8 EX IF HSM
A new telephoto zoom lens, which retains a constant fast aperture of F2.8 at all focal lengths.
This telephoto zoom lens has a large aperture of F2.8 that is constant throughout the zoom range. The angle of view of the 120-300mmF2.8 varies from 20.4degree to 8.2degree and offers great versatility of composition from a fixed position. Two Special Low Dispersion (SLD) glass elements in the front lens group and two in the rear group offer effective compensation of color aberration. Since focusing and zooming do not change its overall length, this lens offers ease of handling. HSM ensures a quiet, high-speed AF, as well as full-time manual focus (for Sigma, Canon and Nikon mounts). A removable tripod collar is provided with the lens. As the front of the lens does not rotate, circular polarizing filters can easily be used. When this lens is used with the 1.4x EX or 2x EX Apo Tele Converters (optional), it becomes a 168-420mmF4 AF telephoto lens or a 240-600mm F5.6 AF ultra-telephoto lens respectively. The lens materials used in this new lens are lead and arsenic free ecological glass.
Focal Length :120-300mm
Maximum Aperture :F2.8
Lens Construction :18 Elements in 16 Groups
Focusing System :Internal Focusing
Angle of View :20.4- 8.2
Number of Diagram Blades :9pcs
Minimum Aperture :32
Minimum Focusing Distance :150cm(wide)-250cm(tele)
Maximum Magnification :1:8.6
Filter Size :105mm
Lens Hood :Bayonet Mount
Dimensions :Diameter 112.8mm/4.4" X Length 268.5mm/10.6"
Mounts (AF) :Sigma, Canon, Nikon (D)