Japanese website EGAMI has posted a new patent for Nikon AF-S NIKKOR 600mm f/4E FL ED VR lens. This lens will replace current AF-S NIKKOR 600mm f/4G ED VR lens, with new Fluorine Coating feature. Currently, there are already two super telephoto prime lenses with Fluorine Coating: AF-S NIKKOR 400mm f/2.8E FL ED VR and AF-S NIKKOR 800mm f/5.6E FL ED VR.
See lens patent below:
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