The Sigma Corporation is pleased to announce the launch of the new APO 50-150mm F2.8 EX DC HSM lens. Specially designed for digital SLR cameras with an APS-C size image sensor, this large aperture F2.8 lens has a compact and lightweight construction of 76.3mm (3")diameter, 132.6mm (5.2") length and weighing just 780g (27.5oz).
The incorporation of the very latest optical technology gives optimum lens performance providing excellent correction for flare, ghosting and all types of aberrations. High image quality is assured throughout the entire zoom range. Four SLD (Special Low Dispersion) glass elements are used for utmost correction of chromatic aberrations.
The HSM (Hyper Sonic Motor) system ensures quiet and high-speed auto focusing with full time manual focus override. The addition of the 1.4x EX DG APO or 2x EX DG APO Tele Converters (optional extras) produces a 70-210mm F4 AF tele-zoom lens and a 100-300mm F5.6 AF ultra-telephoto zoom lens respectively.
Lens Technology Explained:
APO (APO Lens)
In order to attain the highest quality images, the APO lens has been made using special low-dispersion (SLD) glass and is designed to minimize color aberration.
EX (EX Lens)
The exterior of this lens is EX-finished to denote the superior build and optical quality, and to enhance its appearance.
DC for Digital (DC Lens)
These are special lenses designed so that the image circle matches the smaller size of the image sensor of most digital SLR cameras. Their specialized design gives these lenses the ideal properties for digital cameras, the compact and lightweight construction is an added bonus ! including compact and lightweight construction.
HSM (Hyper-Sonic Motor)
This lens uses a motor driven by ultrasonic waves to provide a quiet, highspeed AF.
Focal Length: 50-150mm
Minimum Aperture: F22
Lens Construction: 18 Elements in 14 Groups
Angle of View: 27.9 degrees - 9.5 degrees
Number of Diaphragm Blades: 9 pcs
Minimum Focusing Distance: 100cm (39.4")
Maximum Magnification: 1:5.3
Filter Size: 67mm
Lens Hood: Bayonet Type
Dimensions: Diameter 76.3mm (3")x Length 135.1mm(5.3")