What kind of lenses does all sport photographers have around the field? What lenses are used to capture those amazing animals you see in National Geographic? Well, it is most likely the telephoto lenses.
The long focal range of the telephoto lens allows you to get closer to the subject to you photographing. Besides being used for shooting wildlife and sports the telephoto lens is used to photograph concerts, portraits and news/editorial footage. With the high focal length you can often isolate the subject from the image back- and foreground, making it stand out in a nice way.
The term telephoto lens covers everything from the smaller, lighter and chearper telephoto lenses to the larger, heavier and extremely costly telephoto lenses used by the professionals. If you talk about the lenses used by the sports- and wildlife photographers you often hear the term 'Supertele'.