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Canon Patent Application: Canon EF fast primes
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Canon Patent Application: Canon EF fast primes

This patent application is for a bunch of EF fast primes.

We have embodiments for (you may want to sit down before reading the list)

  • 20mm 1.4
  • 14mm 1.8
  • 22mm 1.2
  • 24mm 1.2

There are some seriously sweet primes shown in this patent application, even if it is for the EF mount.

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.

The details on the embodiments;

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 40.65 

Focal distance 18.52 18.46 18.25 
F number 1.31 1.31 1.31 
Half field angle 49.44 49.53 49.85 
Image height 21.64 21.64 21.64 
Whole length of the lens 106.98 106.51 104.95 
BF 38.97 39.44 41.00 

Focal distance 14.69 14.68 14.64 
F number 1.85 1.85 1.85 
Half field angle 55.82 55.85 55.91 
Image height 21.64 21.64 21.64 
Whole length of the lens 104.15 103.78 102.95 
BF 38.33 38.70 39.53 

Focal distance 22.69 22.60 22.20 
F number 1.24 1.24 1.25 
Half field angle 43.63 43.75 44.27 
Image height 21.64 21.64 21.64 
Whole length of the lens 107.46 106.9 104.5 
BF 38.32 38.88 41.28 

Focal distance 24.10 24.03 23.69 
F number 1.24 1.24 1.24 
Half field angle 41.92 42.00 42.40 
Image height 21.64 21.64 21.64 
Whole length of the lens 108.28 107.72 104.96 
BF 38.33 38.89 41.65 

As with all patent applications, these designs may never make it into the real world (however it'd be nice wouldn't it?)

Japan Patent Application 2019-066586

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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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