This telephoto lens was used with a Canon EOS 5D. It still work. Comes with petal lens hood, front and rear lens caps and soft-sided carrying case. The "Bigma" lens retails for 1600$ brand new, and if you're lucky, you might find it used for 900ish here and there.  

For the technical information on this lens, check out the blurb below, which I shamelessly "borrowed" from their website:

About this item

  • Lens Construction consists of 22 Elements in 6 Groups; 4 SLD (Special Low Dispersion) glass elements provide optimum color correction & sharpness.
  • Offers Sigma’s OS System (Optical Stabilization) for handheld photography in low-light situations and HSM (Hyper-Sonic Motor) for quiet & high-speed auto focus.
  • Angle of View: 46.8-5.0, Minimum Aperture: f22, Minimum Focusing Distance: 50-180 cm / 19.7-70.9 in, Filter Size (mm): 95, and Maximum Magnifications: 1:3.1.
  • Supports only Sigma 1.4X MF and 2X MF Teleconverters for use on Canon digital SLR cameras. Minimum Focusing Distance: 50-180 cm / 19.7-70.9 in