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Another supertelephoto patent surfaces
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Another supertelephoto patent surfaces

We have discovered another supertelephoto patent application from Canon, this one dealing with further reduction of chromatic abberations and axial CA

The lens designs don't specifically have IS elements marked, but does feature element groups that canon usually uses for IS.

The supertelephoto's listed in this patent application are;

  • 300 2.8
  • 400 2.8
  • 500 4.0
  • 600 4.0
  • 800 5.6

Japan Patent Application 2018-018101


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How to view Japan Patent applications.

Unfortunately, there's no direct way of linking to the patent application (sad!) however, this is the easiest process to view a japan patent or application.

  1. Go to the Japan Patent Office search page.
  2. If it's a patent application (they are usually in the format of Year-Number ie: 2017-011300) then type the patent application number into the second field down from the top where it says publication of patent application. 
  3. Click on search.
  4. Then click on the patent application number link, and there's the patent application!

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