If you're interested in long telephoto shots you will already know much about this legendary and relatively affordable lens. This is the the Sport version for Canon. The Sport means weather protection and super sharp optics.
You can use it with a mono pod or a tripod, but I have achieved fantastic results too hand-holding using the brilliant adapter you can see attached to the lens. You can easily remove the steadier if you wish and it will only fit in the canvas case if you do. I just left it out of the case for convenience.
This is a serious lens that will produce some awe-inspiring results. I have attached a few I took at Australia Zoo. They are very small because of the 200kb limit.
Note that this lens is pretty heavy and more of a special occasion lens (like going to the zoo or on safari).
This sells for around $2850 but I'll let it go for $2000 on the nose.