Canon EF 600mm f/4L IS II USM Lens US$12,799
The lens features fluorite optics, capable of providing high-clarity images with low chromatic aberration. The magnesium and titanium-made barrel greatly reduces the lens' weight, while the fluorine coating helps prevent finger prints.
As the IS system on regular super telephoto lenses tends to over-correct vibrations in capturing images from distant or moving objects, the EF 600mm f/4L IS II USM is equipped with a third-generation image stabilizer which is only activated when the shutter button is fully pressed.
Other improvements -- such as those in dust- and water-proofing -- keep this lens in pace with the fast-developing digital age.