Nikon patents 200-500mm f/3.5-5.6 full frame lens

Nikon filed a patent in Japan for a 200-500mm f/3.5-5.6 and  200-500mm f/4-5.6 full frame zoom lenses:

200-500mm f/3.5-5.6  lens calculation:

200-500mm f/4-5.6  lens calculation:

Depending on the price, this could be a very interesting lens if it ever gets released – currently only two FX zoom lenses can reach 400mm: 200-400mm f/4G ED VR II and 80-400mm f/4.5-5.6G ED VR.

Via Egami