The Sigma 500mm APO F4.5 EX DG Lens is a large aperture telephoto lens which can help you capture sharp images of fast-moving subjects. The Sigma 500mm EX DG auto focus telephoto lens incorporates two ELD (Extraordinary Low Dispersion) glass elements for maximum color correction and sharpness throughout the entire zoom range. This lens is specially coated to reduce flare and ghosting caused by reflection from the digital image sensor.

• The Sigma 500mm APO F4.5 EX DG Lens is designed for full frame digital SLR cameras
• The Sigma 500mm EX DG APO lens is an apochromatic ultra-telephoto lens with a fast f/4.5 maximum aperture
• The HSM (Hyper-Sonic Motor) offers a quiet and high-speed auto focus
• With the addition of the optional Sigma APO 1.4x EX teleconverter, this lens can be converted into a 700mm f/6.3 MF ultra-telephoto lens, while the addition of the 2x teleconverter converts the lens into a 1000mm f/9 MF ultra-telephoto lens
• The angle of view is 5º
• The filter holder used is 46mm rear drop-in which provides easy rotation of polarizing filters
• It includes soft case, lens hood, circular PL filter and is also equipped with a fixed tripod socket
• This super telephoto lens is approximately 14 inches long, weighs about  109.7oz and is highly compact
  

Lens Construction: 11 Elements in 8 Groups
APO Tele Converter: 1.4X MF, 2X MF
Angle of View: 5º
Number of Diaphragm Blades: 9
Mininum Aperture: f32
Minimum Focusing Distance: 400 cm / 157.5 in
Filter Size (mm): 46 (Rear)
Maximum Magnifications: 1:7.7
Dimensions (Diameter x Length): 123 x 349.5 mm/4.8 x 13.8 in
Weight: 3100g / 109.7oz.
Corresponding Mounts: Sigma HSM APO CONV EX DG, Nikon HSM APO CONV EX DG D, Canon HSM APO CONV EX DG,  Sony/Minolta APO CONV EX DG, Pentax APO CONV EX DG