Sigma, 50 mm to 500 mm, f/6.3, Telephoto Zoom Lens for Sony Alpha

Key Features and Benefits:

• Covering a range of focal lengths up to ultra telephoto
  This lens is ideal for many types of photography such as motor sport, airplanes, close-up and wildlife. By rotating the zoom ring, it is possible to change the focal length easily from a standard focal length to an ultra telephoto range.
• Sigma's own unique OS technology
  The lens is equipped with Sigma's own unique OS (Optical Stabilizer) function. This system offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible, making telephoto shooting easy.
• Excellent optical performance
  This lens features four SLD (Special Low Dispersion) glass elements, providing excellent correction of color aberration throughout the entire zoom range. The super multi-layer coating reduces flare and ghosting and ensures high contrast images. This lens is equipped with a read focus system that minimizes fluctuation of aberration caused by focusing. High image quality is assured throughout the entire zoom range.
• Close focusing capability
  This lens has a maximum magnification of 1:3.1. It enables photographers to get close up to small subjects and eliminate distracting parts of larger subjects.
• HSM (Hyper Sonic Motor)
  The rear focus mechanism and HSM (Hyper Sonic Motor) ensures quiet and high speed AF as well as full time manual focus capability.
• Easy operation and handling
  This lens features a zoom lock device to eliminate "zoom creep" when the lens is tilted down. When the lens is set to the 50mm focal length, it is remarkably compact and provides easy handling.