"This high-performance lens was designed with portability and handling ease in mind. One Super UD-glass element, whose characteristics are similar to fluorite, and one UD-glass element result in ...

(From Canon lens literature ... the zoom range can be quickly increased to 280–560mm (f/5.6). This capability is extremely useful in applications where it is not possible to change lenses ...

Obviously, this will also depend on the steadiness of the photographer as well. In summary, the Canon EF 400mm f/2.8L IS III USM lens is a superb performer. You can view additional images in the ...