$679 deal for Nikon one at http://www.ebay.com/itm/Sigma-150-600mm-F5-6-3-DG-OS-HSM-Zoom-Lens-Contemporary-for-Nikon-DSLR-Cameras-/321861282065

Sigma 150-600mm F5-6.3 DG OS HSM "Contemporary" Lens for $789

• Canon - https://www.adorama.com/sg150600cca.html
• Nikon - https://www.adorama.com/sg150600cnk.html

New firmware

• Ensured compatibility with Canon’s in-camera Lens Aberration Correction function, which enables correction matching the optical characteristics of the attached lens.
  Compatible cameras:
  Canon EOS-1D X Mark II, EOS 5Ds, EOS 5Ds R, EOS 5D Mark IV, EOS 6D Mark II, EOS 80D, EOS 8000D (EOS Rebel T6s, EOS 760D), EOS 9000D (EOS 77D) , EOS Kiss x8i (EOS Rebel T6i, EOS 750D), EOS Kiss x9i (EOS Rebel T7i, EOS 800D), EOS Kiss x9 (EOS Rebel SL2, EOS 200D)
• Corrected the phenomenon that abnormal images appear or operation errors occur when Canon’s in-camera Lens Aberration Correction function is enabled.
• Improved the AF speed in certain combinations with some cameras.

https://dc.watch.impress.co.jp/docs/review/special/1340397.html