This is one of Canon's great sports and wildlife lenses. I'm only selling it because I've moved to mirrorless technology, and despite all the new advances, this lens is really hard to let go of. It is so natural to use, quick to focus, and intuitive for tracking birds, zooming in while keeping focus... it's a great tool. So, I'm letting it go now.
I'm a Getty images photographer, and have treated this carefully, and regularly cleaned and checked by Canon Professional Services.
A great lens if you want the focal length and portability.
I'm delighted with the sharpness and quality of this lens, and have included some shots from it.