A fantastic,compact, lightweight telephoto zoom lens for Canon DSLRs that I mainly used for wildlife photography. Produces great photos (sample photos attached), and the firmware has been updated to the most recent version! (as of Oct. 29, 2019), so has greatly improved image stabilization. Has a few faint scuffs on the body and lens hood (won't affect image quality or use), but otherwise in excellent condition. Around $1100 new. Open to trades as well. Comes with lens hood and third party tripod collar (wrapped with electric tape for better grip - Sigma does not make their own tripod collar for this lens). Other features: - Weather sealed gasket - Image stabilization (2 modes) - 2 programmable custom settings switches (requires the Sigma usb dock to configure) - Focus limiter - 67mm filter thread - HSM full-time focusing (with manual override) - Min focus of 1.6m (a lot closer than what Sigma's 150-600mm lens can do, for those moments where an animal actually comes close!) - Is sharper than Canon's Mark II equivalent lens at some focal lengths according to tests; Overall sharper than the 100-400 Mark I version