New Patents: Nikon 400mm, 500mm and 600mm f/5.6 Phase Fresnel (PF) Lenses
Nikon has filed a new patent (P2018-17857A) in Japan: the new Nikon 400mm f/5.6 (22cm long), 500mm f/5.6 (28cm long) and 600mm f/5.6 (33cm long) full frame Phase Fresnel (PF) lenses.
Nikon AF-S NIKKOR 300mm f/4E PF ED VR Lens is currently in stock at most US stores: $1,996.95 at Amazon, B&H, Adorama
Via: NikonRumors