We already reported that the new Nikon 600mm f/5.6 (33cm long) full frame Phase Fresnel (PF) lens. According to the report coming out of NikonRumors, Nikon will soon announce a new Nikkor 600mm f/5.6 PF lens in 2018. The details and announcement date are unknown at the present, but we hope to hear more soon!
Currently, Nikon AF-S NIKKOR 300mm f/4E PF ED VR Lens ($1,996.95) is the only Phase Fresnel (PF) lens from Nikon.
Stay tuned for more info.