Best lens purchase ever? My switch from Canon EF 500/4 L IS to Canon EF 600/4 L IS II (review)

I bought the EF 600mm f/4 L IS II in 2018 and it has been my most used lens for bird photography since. After several years of use and more than 100’000 pictures taken with it I thought it was time for a review of the lens where I can share my experiences with you. This review covers AF, image quality, image stabilization (IS) and the handling and costs of the lens. Please also check out my other reviews: Canon RF 100-500mm Review: https://youtu.be/olgDE2C7_T4 The perfect tripod head? FlexShooter Pro Review: https://youtu.be/w6zEXUNWQQM Canon R5 - BIG Autofocus problem: https://youtu.be/rCks9EZ7oTk Telephoto lens for beginners - RF100-400 Review: https://youtu.be/T_64-8owemo Canon EOS R7 Review: https://youtu.be/W2UGMYzrgLM