Several days ago, according to Northlight Images the Canon EF 200-400mm f/4L IS USM Extender 1.4x Lens has been leaked when shooting a tennis match in Wimbledon. There are no exact specifications for this lens. We know that the extender is build-in and switchable, meaning it becomes a 280-560mm F5.6 lens.
About the price:
The price tag about this lens is at $11,000 to $12,000 as rumored.
Press release in USA, announced by Canon last year:
LAKE SUCCESS, N.Y., February 7, 2011 – Canon Inc. today announced the development of a new super-telephoto lens, the EF 200-400mm f/4L IS USM EXTENDER l.4x, for use with all EOS SLR cameras. A prototype of the new lens will be exhibited at the CP+ tradeshow, held in Pacifico Yokohama, from February 9 – 12, 2011.
The EF 200-400mm f/4L IS USM EXTENDER l.4x is being developed as an L-series super-telephoto lens with an integrated 1.4x extender and high-performance Image Stabilizer technology. The new lens will offer exceptional flexibility by incorporating a built-in 1.4x extender that increases the maximum focal length to 560mm for sports and wildlife photography. High-quality images with high levels of resolution and contrast will be possible through the use of advanced optical materials such as fluorite crystal. The new lens will also include dust- and water-resistant construction designed for extended usage under harsh conditions.