Designed for use with full frame digital SLR cameras. May also be used with smaller APS-c size sensors with a corresponding effective increase in focal length to about 450 to 1200mm F5.6 most camerasHSM (Hyper-Sonic Motor) ensures a quiet & high-speed auto focusWeighing 13 lbs & an overall length of 21 inches it can still be accommodated in a large professional backpackWhen used with full frame cameras & Sigma 1.4x or 2x optional Tele Converters it becomes a 420-1120mm F8 manual focus lens or a 600-1600mm F11 manual focus lens respectivelySoft case, lens hood, circular PL filter are included. It is equipped with fixed tripod socket.

Lens Construction	18 Elements in 16 Groups
APO Tele Converter	1.4X MF 2X MF
Angle of View	8.2º-3.1º
Number of Diaphragm Blades	9
Mininum Aperture	f32
Minimum Focusing Distance	600 cm / 236.2 in
Filter Size (mm)	46 (Rear)
Maximum Magnifications	1:6.9
Dimensions (Diameter x Length)	156.5x541.5 mm/6.2x21.3 in
Weight	5870g / 207oz.
Corresponding Mounts	Sigma HSM APO CONV EX DG Nikon HSM CONV EX DG D Canon HSM CONV EX DG
HSM - Hyper-Sonic Motor APO - Apochromatic CONV - APO Teleconverter EX EX - EX Lens DG - DG for Digital D - Distance Information Function * Nikon Mount: Built in motor lens: compatible with D40, D40x, D60, D3000, D5000 * The appearance, specifications, and the like of the product are subject to change for improvement without notice.