Application: sports, nature, remote scenery. About image quality - Canon L series! Ease of use is a matter of habit. The lens is large, heavy and not cheap, which imposes its own characteristics of use. The lens is large, and it is very easy for them to touch branches and other unwanted objects when moving - I recommend constantly using a lens hood and a protective filter. The lens is heavy and trombone - pay attention to the fixation ring, which does not allow the lens to move apart into the "trunk". Also, the weight of the lens will not have a very positive effect on the bayonet, if you do not carefully take the camera by the carcass. When shooting, it is very useful to use a monopod.