Sigma 60-600 vs Sony 200-600: BEST WILDLIFE ZOOM LENS!

Buy the Sigma 60-600 f/4-6.3 DC DN for $2,000 at http://sdp.io/S60600 Buy the Sony 200-600 f/5.6-6.3 G OSS for $2,000 at http://sdp.io/s200600 Sigma just launched an ALL NEW 10X zoom lens for sports & wildlife mirrorless photographers! It fits both Sony E-mount and L-mount (Panasonic and Leica) mirrorless cameras: The 60-600! Tony & Chelsea Northrup test it for sharpness, autofocus performance, frames per second with the Sony a1, handling, balance, design, minimum focusing distance, focus breathing/focal shrinking, and MORE! 0:00 Introduction 1:27 Design & Handling 3:46 Sharpness 5:43 Magnification & Focus Breathing 8:40 Autofocus 11:07 Stabilization 11:50 Summary