I had the lens in Montana/Wyoming for 5 days. It really showed me the limitations of my equipment. I have a 6D so using the 1.4x and 2x extenders really without AF was tough. Manually focusing via the rear LCD screen in the sun sucked. Also it showed that my Manfrotto tripod seriously lacks in stability.IMAGE LINK: https://flic.kr/p/uK862o Dinner Time
by Scott Tice
, on Flickr
What impressed me the most about the lens was the IS. When it locks on it really locks on! Amazing stuff.
I don't shoot sports/wildlife enough to justify this lens but I will most certainly consider renting it again in the future.
Big shout out to LensRentals who shipped the lens early allowing me to use it for a few extra days for free. The entire experience was excellent and I highly recommend it.