More details in the press release below.
Canon Press Release
United Kingdom, Republic of Ireland; 26 August 2010 – Canon today announces the development of two new super-telephoto lenses for its leading range of EOS Digital SLR cameras – the EF 500mm F/4L IS II USM and the EF 600mm F/4L IS II USM. The new lenses will be displayed for the first time in Europe during Photokina 2010 in Cologne, Germany.
Developed as part of Canon’s acclaimed L-series of professional lenses, the new lenses will achieve new and advanced levels of image quality. Each will include the highest quality components, featuring high specification Image Stabilizer technology alongside the use of optical materials such as Fluorite, to correct aberrations ensuring high resolution images rich in detail and contrast.
Succeeding the widely-respected EF 500mm F/4L IS USM and EF 600mm F/4L IS USM, the EF 500mm F/4L IS II USM and EF 600mm F/4L IS II USM are being developed for photographers who require high performance, fast aperture and a longer focal length. Redesigned, lightweight bodies will provide added mobility alongside enhanced protection against dust and water, making them ideal for the toughest shooting conditions.
Both new lenses have been designed to reflect Canon’s renowned high standards for the elite L-series, combining exceptional-quality optics with easy-to-reach controls and signature designs. The models will be released as part of Canon’s continued development of its EF lens line-up, offering enhanced performance and improved functions that cater for the needs of photographers from beginners through to professionals.