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Canon Patent Applications: More Canon EF fast primes
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Canon Patent Applications: More Canon EF fast primes

Just because the other patent we found didn't have enough fast prime goodness for the EF mount we also have this patent application.  If you haven't seen the other patent application, you'll just have to check out this one here as well.

This patent application is for more ultra-fast EF primes.  It's nice to see Canon continuing with their research into EF mount lenses in a big way.

We have in this patent application embodiments for; 

  • 20mm 1.4
  • 16mm 1.4
  • 14mm 1.8
  • 17mm 1.8
  • 16mm 1.8
  • 18mm 1.8

Because the focal length shows for different focus distances, these may be slated for the CINI EF lens lineup, as the lenses are pretty close to parfocal.

And here's the details on those lenses;

Focal distance 20.50 20.45 20.26 
F number 1.45 1.45 1.45 
Half field angle 46.54 46.54 46.54 
Image height 21.64 21.64 21.64 
Whole length of the lens 100.04 99.55 97.71 
BF 38.32 38.81 40.64 

Focal distance 16.40 16.36 16.21 
F number 1.45 1.45 1.45 
Half field angle 52.84 52.84 52.84 
Image height 21.64 21.64 21.64 
Whole length of the lens 98.97 98.65 97.42 
BF 38.50 38.83 40.05 

Focal distance 14.40 14.38 14.29 
F number 1.83 1.83 1.83 
Half field angle 56.35 56.35 56.35 
Image height 21.64 21.64 21.64 
Whole length of the lens 88.57 88.32 87.42 
BF 38.79 39.04 39.94 

Focal distance 17.16 17.14 17.06 
F number 1.83 1.83 1.83 
Half field angle 51.58 51.58 51.58 
Image height 21.64 21.64 21.64 
Whole length of the lens 90.00 89.66 88.39 
BF 40.51 40.86 42.12 

Focal distance 16.04 16.00 15.86 
F number 1.83 1.83 1.83 
Half field angle 53.45 53.45 53.45 
Image height 21.64 21.64 21.64 
Whole length of the lens 94.99 94.67 93.46 
BF 38.80 39.13 40.33 

Focal distance 18.81 18.75 18.52 
F number 1.83 1.83 1.83 
Half field angle 48.99 48.99 48.99 
Image height 21.64 21.64 21.64 
Whole length of the lens 93.37 93.37 93.37 
BF 39.52 39.52 39.52 

Yeah. Wow.

Japan Patent Application 2019-066585

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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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