Sigma 800mm f/5.6 APO EX DG/HSM announced

Sigma 800mm f/5,6 APO

Incorporating two Extraordinary Low Dispersion glass elements to reduce chromatic aberration to a minimum and ensure sharp, quality images. The overall length of the lens does not change during focusing, ensuring convenient handling and ease of use.
The Hyper Sonic Motor (HSM) ensures an ultra-quiet, high-speed AF function as well as full-time manual focusing capability for Sigma, Canon, and Nikon mount lenses. A 46mm filter can be inserted near the rear of the lens, and a circular polarising filter can be used in situ.

By adding a 1.4x EX APO teleconverter (optional extra), you can use this lens as a 1120mm f/8 MF ultra-telephoto lens or as a 1600mm f/11 MF ultra-telephoto lens with a 2.0x EX APO teleconverter.

THE SPECIFICATIONS
Focal Length 800mm
Minimum Aperture f/32
Lens Construction 12 Elements in 9 Groups
Angle of View 3.1°
Number of Diaphragm Blades 9pcs
Minimum Focusing Distance 700cm (275.6”)
Maximum Magnification 1:8.8
Filter Size 46mm (drop-in type)
Lens Hood Bayonet Hood
Dimensions Diameter 156.5mm(6.2”) x Length 521mm (20.5”)
Weight 4900gr/172.8oz
Fittings Sigma, Canon and Nikon-D (Pentax and Konica/Minolta TBA).