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Sigma announce 50-500mm F4-6.3 EX DG/HSM - High Magnification Ultra Telephoto Zoom Lens, with a 10x zoom ratio from 50mm to 500mm, optimized for digital SLR cameras with Triple-cam Rear Focusing System for high precision throughout the whole focus range.
The new lens coating reduces flare and ghost, which is a common problem of digital cameras and also creates an optimum color balance.
This lens uses four pieces of SLD (the special low dispersion) glass for excellent correction of color aberration. A zoom lock switch eliminates ‘zoom creep’ during transportation, a convenient addition when traveling. The HSM Hyper Sonic Motor models provide quiet high-speed AF function, as well as full-time manual focus capability., The rear focus mechanism produces a non-rotating front lens element which accepts a bayonet "Petal-type Hood", which prevents extraneous light from degrading the image quality.
By adding an APO teleconverter (sold separately), you can use this lens as a 140-700mm f/7.3-8.8 MF ultra-telephoto zoom lens with a 1.4X EX teleconverter, or as a 200-1000mm f/10.4-12.6 MF ultra-telephoto zoom lens with a 2X teleconverter.
Teleconverters can be used in 100mm – 500mm focal length range
Focal Length 50-500mm
Minimum Aperture F22
Lens Construction 20 Elements in 16 Groups
Angle of View 46.8°- 5°
Number of Diaphragm Blades 9pcs
Minimum Focusing Distance 100cm –300cm(39.3”-118.1”)
Maximum Magnification 1:5.2
Filter Size 86mm
Lens Hood Petal Hood
Dimensions Diameter 95mm (3.7”) x Length 218.5mm (8.6”)
Fittings Sigma, Canon and Nikon-D, (Konica/Minolta and Pentax TBA)
The appearance and specifications are subject to change without notice.