"TOKYO - Nikon Corporation will add the super-telephoto 800-mm, fixed local length lens to its lineup of NIKKOR lenses. This lens will offer a fixed focal length of 800 mm, a maximum aperture of f/5.6, and will be fully compatible with Nikon FX-format cameras.
This lens has been developed in order to strengthen the NIKKOR lineup of super-telephoto lenses. It will boast the longest focal length of any NIKKOR autofocus lens, and will be best suited to capture of a wide variety of decisive outdoor scenes, from sporting events to wildlife. In addition to its superior optical performance, the lens will offer dust and water resistance.
In 2012, Nikon released three new FX-format digital-SLR cameras—the D4, the new flagship digital SLR, and the D800 and D800E, which offer incredible resolution and image quality. In addition to reinforcing its lineup of FX-format digital-SLR cameras, Nikon has also been working to expand the lineup of NIKKOR lenses."
There is no release date and no retail price announced but you can bet it will be 10-15 large, as the 600mm f4 is $11,000 +-, the price of a good used pickup truck, or a long journey somewhere exotic.
Naturally, reviews and tests will compare it with the 800mm EF f5.6 Canon ($14,000 Cdn), weighing in at 10 pounds, the Sigma 800 f5.6 ($6500), or the Sigma 300-800mm f5.6 ($10,000) but right now any comparisons are pure speculation.
The lens is will be in action during July's Open Golf Championship in England, and likely at the Olympics. It will show at Photokina, Sept 18-23, 2012 in Cologne, Germany.