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Canon Patent Application: Canon RF 14-21 1.4
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Canon Patent Application: Canon RF 14-21 1.4

I literally had to read the embodiments twice for this patent application, just in case I was hallucinating.

This patent application is for a mind boggling 14-21mm 1.55 (or 1.4 more or less) RF lens.

Focal Length   14.50    17.45   21.00
F-Number        1.55     1.55    1.55
Image Height   21.64    21.64   21.64
BF             17.10    21.64   21.64

There is also a more normal embodiment, but I really liked the 14-21;

Focal Length   16.00    22.62   32.00
F-Number        2.80     2.80    2.80
Image Height   21.64    21.64   21.64
BF             21.35    21.35   21.35

There's also another embodiment no less insane as the 14-21;

Focal Length   12.00    15.49   20.00
F-Number        2.00     2.00    2.00
Image Height   21.64    21.64   21.64
BF             14.88    14.88   14.88

As with all patent applications, this is Canon research, not a finished product.

US Patent Application 20180314060

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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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