According to the latest rumors from NR, Nikon will announce a new 200-500mm Full-Frame Zoom lens. It is not confirmed yet whether this FX lens could be a fixed aperture lens.
So far, in this ranger, there is only Sigma 200-500mm f/2.8 EX DG APO IF Autofocus Lens available for Nikon DSLR, but it is too much expensive for $25,999.
Source: NR
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