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Canon Patent Application: Canon RF 35mm F1.2
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Canon Patent Application: Canon RF 35mm F1.2

This patent application describes a lens that would make a lot of sense for Canon to develop and release, the Canon RF 35mm F1.2.  This would complete the trifecta of F1.2 lenses.  All these embodiments are big (130mm for the lens), and by the elements shown, heavy and complicated and thus, well, expensive.  We hope that Canon will work on an excellent F1.4 and F1.8 set of primes as well.

Focus Distance              34.00  
F number                     1.23  
Half angle of view (degree) 32.47  
Image height                21.64  
Lens total length          147.45  
BF                          19.82  

Focal length                35.76  
F number                     1.23  
Half angle of view (degree) 31.17  
Image height                21.64  
Lens total length          147.45  
BF                          19.50

Focal length                34.00  
F number                     1.23  
Half angle of view (degree) 32.47  
Image height                21.64  
Lens total length          147.45  
BF                          20.95  

Focal length                34.00  
F number                     1.23  
Half angle of view (degree) 32.47  
Image height                21.64  
Lens total length          149.45  
BF                          16.49  

Canon Patent Application 2021-060475

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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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