Patent: Multiple small RF prime lens optical formulas

Craig Blair
1 Min Read

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Canon News has uncovered a patent that shows Canon is working on small RF prime lenses, like non-L.

Japan patent 2019-152683 does include the RF 35mm f/1.8 IS STM Macro in one of the embodiments, but keep in mind that lens design can sometimes build off of existing lenses.

RF prime lens optical formulas in this patent:

  • Canon RF 20mm f/2 (Lens length of 70mm)
  • Canon RF 35mm f/2.8 (Lens length of 40mm)
  • Canon RF 45mm f/2.8 (Lens length of 43mm)
  • Canon RF 35mm f/2 (Lens length of 30mm)

Beyond the prime lenses, there is also a wide-angle f/4 zoom included.

  • Canon RF 16-35mm f/4 (Lens length 90mm – 97mm)

Looking at all the embodiments, I think only the RF 16-35mm f/4 could realistically be coming.

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Craig is the founder and editorial director for Canon Rumors. He has been writing about all things Canon for more than 17 years. When he's not writing, you can find him shooting professional basketball and travelling the world looking for the next wildlife adventure. The Canon EOS R1 is his camera of choice.
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