Canon Patents

Patent: Canon RF 24-70mm f/2.8L IS

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Another patent application for a Canon RF 24-70mm f/2.8L IS has appeared within what appears to be a patent for the RF 28-70mm f/2L.

From Japan Patent Application 2019015956:

  • Focal length: 24.69 37.63 67.88 
  • F-number: 2.91 2.91 2.91 
  • Half angle of view: 41.23° 29.90° 17.68° 
  • Image height: 21.64 21.64 21.64 
  • Lens total length: 139.21 150.29 171.74 
  • BF: 13.49 22.31 35.10

Canon has already let us know that they’re hard at work on the “holy trinity” of pro zoom lenses for the RF mount. We expect all three lenses to be announced in 2019.


Jan 16, 2019
It seems Canon will catch the race quite fast. If they can introduce 5 new RF lenses in 2019 (holy trinity + 2 reasonably priced lenses like 50mm f1.8 and 70-300mm) then Canon will also catch market share of Sony in FF mirrorless systems by end of 2019.

Aaron D

Jul 21, 2016
Kansas City
[QUOTE="...optional IS group.[/QUOTE]

Huh. Seems strange IS would be "optional" to the design. AND it also seems strange that looks to be where the iris is. But what do I know—zero experience in designing lenses…..