Nikon Lens Patents

Started Sep 21, 2019 | Discussions thread
OP Dibyendu Majumdar Contributing Member • Posts: 758
Re: Nikon Lens Patents

bclaff wrote:

Dibyendu Majumdar wrote:

A few more additions at:

  • 35-70mm f2.8 AIS

Really? The only entry I see is Nikon AI Zoom-Nikkor 35-70mm f/2.8S.
And the patent next to it (US 4806000A) is all 28.8-83.3mm f/3.5-4.0 examples.

Indeed the text says 28-83 but the lens shown is the 35-70mm f2.8. Deliberate obfuscation? I have not yet put the formula in to check.

Update: Upon second look the formula looks close but not exactly the same as in 35-70mm f2.8 so it may not be an exact match.

  • 105mm f2.8 micro AIS

This looks like Tale 72 (which I think you wrongly identify as the AF-D lens).
I have this already as a different (perhaps identical) patent.

Nikon AI AF Micro-Nikkor 105mm f/2.8S

OK, yours looks like the AI-S that's not AF.
Looking for an authoritative diagram.

The AIS version and the AF-D version seem to be very similar. - manual focus

The tale 72 is about the AF-D version.

I think the patents I list look correct at least visually and from inventor/timeline perspective.

  • 600mm f4 FL-E

Nikon AF-S Nikkor 600mm f/4E FL ED VR

  • 800mm f5.6 FL-E

Nikon AF-S Nikkor 800mm f/5.6E FL ED VR

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