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 1200 with most camerasHSM (Hyper-Sonic Motor) ensures a quiet & high-speed auto focusJust over 20 inches long & weighs approximately 10.4poundsInner focusing system which enables responsive & fast auto focus speed & overall length does not change during focusing.Soft case, lens hood, circular PL filter are included. It is equipped with fixed tripod socket.

Lens Construction	12 Elements in 9 Groups
Angle of View	3.1°
Number of Diaphragm Blades	9
Mininum Aperture	f32
Minimum Focusing Distance	700 cm / 275.6 in
Filter Size (mm)	46mm (Rear)
Maximum Magnifications	1:8.8
Dimensions (Diameter x Length)	156.5 x 520 mm/6.2 x 20.5 in
Weight	4740g / 167.2oz.
Corresponding Mounts	Sigma HSM CONV Nikon HSM CONV D Canon HSM CONV
HSM - Hyper-Sonic Motor CONV - APO Teleconverter EX D - Distance Information Function * The appearance, specifications, and the like of the product are subject to change for improvement without notice.