According to the Egami Blog, Nikon has patented the optical formula for the 300mm f/2.8E FL ED VR lens.
Patent Details
Patent Details
- Patent Publication No. 2016-161641
- Published: 2016.9.5
- Filing date: 2015.2.27
- Focal length: 294.00
- f-number 2.91
- Air conversion TL 304.88
- BF 67.25
- Air-converted BF 66.74
- Inner focus
- Anti-vibration (part of the third group)
- Adjustable air gap adjustment lens group
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