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Canon Patent Application: Canon RF 12mm F2.8 and 14mm F2.8
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Canon Patent Application: Canon RF 12mm F2.8 and 14mm F2.8

There was a patent application published today with some interesting super ultra wide lenses that I'm sure a lot of people would love to see developed.  They aren't exactly fast enough for the astro-landscape crowd, but they are most likely cheaper and easier to carry around and obtain than esoteric F1.8 or F2.0's.

Sooner or later Canon will start to fill out it's lens lineup with lenses like this, as the Canon EF system certainly had a 14mm prime and a 20mm prime.

Canon RF 12mm F2.8

Focus distance    12.35
F number           2.88
Half angle (°)    60.28
Image height      21.64
Lens total length 80.22
SK                16.54

Canon RF 14mm F2.8

Focal length      14.42
F number           2.88
Half angle (°)    56.32
image High        21.64
Lens total length 91.61
BF                17.29

Canon RF 20mm F2.8

focal length      19.48
F number           2.88
Half angle (°)    48.02
Image height      21.65
Lens total length 90.74
BF                19.35

Japan Patent Application 2021-047384

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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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