Nikon filed more patents for telephoto lenses with fluorite element – the list of future FL lenses now matches exactly the rumor I reported few months ago with the exception of the 200-400mm f/4 lens.
Here are the upcoming Nikkor FL lenses described in the latest Nikon patent filed recently in Japan:
![Nikon 600mm f:4 FL ED VR lens patent](https://nikonrumors.com/wp-content/uploads/2014/11/Nikon-600mm-f4-FL-ED-VR-lens-patent.png)
Nikon 600mm f/4 FL ED VR lens patent (already reported last week)
The Nikon 400mm f/2.8E FL ED VR, 800mm f/5.6E FL ED VR lenses and TC-14E III teleconverter already have FL elements.
Via Egami