NikonGear'23

Gear Talk => Lens Talk => Topic started by: dibyendumajumdar on September 03, 2022, 11:20:01

Title: Seeking help from Japanese readers
Post by: dibyendumajumdar on September 03, 2022, 11:20:01

Hi

I was wondering if we have forum members who can help me identify the inventor in following patents:

600mm f5.6 ED  - https://www.j-platpat.inpit.go.jp/c1800/PU/JP-S51-043918/549D87CCE4E18A300242A823FFA3727BCB0A3C400E092B26232FB4351C808F35/11/en

300mm f4.5 ED  - https://www.j-platpat.inpit.go.jp/c1800/PU/JP-S51-043917/53F617136C6E41D3813A573E93D89F52D8913B071E50097D2097A6EC78CC658A/11/en

Thank you

Title: Re: Seeking help from Japanese readers
Post by: jborg on September 03, 2022, 13:29:26

For the 300 mm f/4.5 the main inventor/designer is Yoshiyuki Shimizu.
Marco Cavina provided a brilliant and detailed coverage of this lens and its evolution in the following page (in Italian):
https://www.nocsensei.com/camera/tecnica/marco-cavina/marcocavina/nikon-nikkor-ed-300mm-145-non-if/

Title: Re: Seeking help from Japanese readers
Post by: jborg on September 03, 2022, 13:33:01

Same inventor for the second lens as you can read on the J-Plat-Pat translation of the detailed description of the patent.
It seems that this designer is revered as Maestro Shimidzu in the Nikon circles

Title: Re: Seeking help from Japanese readers
Post by: Akira on September 03, 2022, 17:28:07

Quote from: dibyendumajumdar on September 03, 2022, 11:20:01

Hi

I was wondering if we have forum members who can help me identify the inventor in following patents:

600mm f5.6 ED  - https://www.j-platpat.inpit.go.jp/c1800/PU/JP-S51-043918/549D87CCE4E18A300242A823FFA3727BCB0A3C400E092B26232FB4351C808F35/11/en

300mm f4.5 ED  - https://www.j-platpat.inpit.go.jp/c1800/PU/JP-S51-043917/53F617136C6E41D3813A573E93D89F52D8913B071E50097D2097A6EC78CC658A/11/en

Thank you

The inventor of both lenses is Yoshiyuki Shimizu.

Title: Re: Seeking help from Japanese readers
Post by: dibyendumajumdar on September 03, 2022, 20:28:04

thank you