Nikon 600mm f/5.6 PF Lens Coming Soon
The previous report said the Nikon has filed a new patent in Japan: the new Nikon 600mm f/5.6 (33cm long) full frame Phase Fresnel (PF) lens. Today, trusted sources are claiming that the Nikon will soon announce a new Nikkor 600mm f/5.6 PF lens in 2018, probably July or August. The details and announcement date are unknown at the present.
Stay tuned for more info.