I have a friend that has won some of the largest photo contest in the world with this lens Photographer of the year Africa, Natures best Africa, PPA world cup and has over 3,000,000 photos take with it. It looks like it was drug behind a truck but it still going and back in Africa right now.
What a great lens i have a friend that has won some of the largest photo contest in the world using the Sigma 60-600. He has over 3 million shot on his lens and it's still going strong looks like its been drug behind a truck but still works perfect.
Nothing beats a big prime The 600F4 has been the go to lens for wildlife photography for many pro. There's no way i would want be without my RF600 and now with Mirrorless cameras the 1.4/2X TCs work great!!!!