The EF 800mm f/5.6L IS USM Lens from Canon is
currently Canon's longest telephoto lens, and an excellent choice for
any long-distance application such as outdoor sports, wildlife, and
photojournalism. Even though it has a long 800mm focal length, the
magnesium alloy used in the construction for this lens makes it lighter
then the 600mm f/4L lens, weighing in at less than 10 lb.
lens shares the same lightweight, weather-resistant construction as the
rest of the L-series super telephoto lenses, as well as their improved
control layout, weight distribution, and mechanical manual focus.
Its two-mode Image Stabilizer system allows the use of shutter speeds up
to four times slower with no perceptible increase in image blur. Mode 1
is best used for still subjects while Mode 2 is optimized to pan
with moving subjects.
An ultrasonic autofocus motor enables
fast, smooth and quiet AF action, while a focus preset function allows
you to store focusing positions and return to them in an instant when
needed. An AF stop button will pause autofocus with just a touch and
manual focus override allows precise manual focus even in AF mode. A
focus range limiter function lets you to save time by establishing a
focus distance range for your specific subject.
For optimum visual
performance, the lens incorporates four types of special optical
elements: aspherical elements to correct spherical aberrations, and
refracting Fluorite, UD and Super UD (ultra-low dispersion) elements to
eliminate secondary chromatic aberrations. An integrated, rotating
tripod collar provides balance and stability and the rear drop-in filter
slot and holder enable easy filter use. A large lens hood, hard case
and lens caps are included.