Canon has launched two new super-telephoto lenses for its EOS range – the EF 500mm f/4L IS II USM and the EF 600mm f/4L IS II USM. Designed to meet the needs of the most demanding sports and wildlife photographers, both lenses offer breakthrough performance, delivering consistently high-quality images and incredible mobility. The launch of the models follows a development announcement in August 2010, and the display of prototypes at Photokina 2010 in Cologne, Germany. The new lenses replace the EF 500mm f/4L IS USM and EF 600mm f/4L IS USM. Each includes the highest-quality optics and the latest Canon Image Stabilizer (IS) technology, while magnesium alloy constructions with titanium components make each lens significantly lighter and even more durable. Launching as the lightest lens in its class (according to Canon market research conducted in December 2010) the EF 600mm f/4L IS II USM benefits from a 27% reduction (1.4kg) in weight compared to its predecessor, while the EF 5...