The latest Nikon patents: 400mm, 500mm and 600mm f/5.6 Phase Fresnel (PF) lenses

Nikon 400mm f:5.6 lens patent

Nikon 400mm f/5.6 lens patent

Nikon 500mm f/5.6 lens patent

Nikon 500mm f/5.6 lens patent

Nikon 600mm f:5.6 lens patent

Nikon 600mm f/5.6 lens patent

Nikon filed a patent (P2018-17857A) in Japan for a 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.

Addition information on Nikon Phase Fresnel (PF) lenses can be found here:

Nikon’s Phase Fresnel (PF) lens explained

As of today the Nikkor 300mm f/4E PF ED VR is the only Nikon Phase Fresnel (PF) lens.

Another Nikon patent for a layered BSI sensor (P6048482).

Interestingly enough this Nikon patent describes “variable-power optical system (ZL)” – maybe a reference to the rumored mirrorless Z-mount? Update: ZL could also mean zoom lens. This patent is for a 14-28mm f/2.8 VR DSLR lens.

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