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 150 to 400mm with most cameras

HSM (Hyper-Sonic Motor) ensures a quiet & high-speed auto focus

Inner zooming and inner focusing eliminates front lens rotation & suitable for use of polarizing filters

Sigma’s APO 100-300mm F4 EX DG is a telephoto zoom lens that allows photographers to take advantage of a long focal length for effect such as shortening perspective between the subject and background of blending subject that are in and out of focus. Three SLD (Special Low Dispersion) glass elements provide optimum color correction & sharpness throughout the entire zoom range. Compatible with Sigma 1.4 & 2x Tele Converters. This lens is an excellent performer in the EX professional series, incorporating key technologies such as apochromatic formulation for sharp images with precise color and a hypersonic motor for fast focusing.

Lens Construction	16 Elements in 14 Groups
APO Tele Converter	1.4X AF 2X MF
Angle of View	24.4º-8.2º
Number of Diaphragm Blades	9
Mininum Aperture	f32
Minimum Focusing Distance	180 cm / 70.9 in
Filter Size (mm)	82
Maximum Magnifications	1:5
Dimensions (Diameter x Length)	92.4 x 224 mm/3.6 x 8.8 in
Weight	1480g / 52.2oz.
Available in Nikon/Canon Mounts

For more info, please visit:

http://www.sigmaphoto.com/shop/100-300mm-f4-ex-dg-apo-hsm-sigma