https://www.techradar.com/news/nikon-has-a-new-compact-500mm-f56-lens-in-the-works

It's been a pretty quiet year for Nikon so far, with no new camera announcements and just one lens launched. Now, though, the company has announced the development of a new AF-S 500mm f/5.6E PF ED VR telephoto prime lens.

While Nikon already has the fast AF-S 500mm f/4E FLED VR, the new lens, which will sit alongside that one, should be significantly smaller and lighter thanks to the inclusion of a Phase Fresnel (PF) element.