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  1. R

    Canon Patent application for a Canon RF 24-80mm f/4

    Does this make sense when the 24-105 is available?
  2. R

    Patent: Canon RF 50-80mm f/1.1, because crazy is good

    It's because the f stop is absorbing it all.
  3. R

    Just the MTF Charts: 70-200mm f/4 Zoom Lenses

    The f4 link brings you to the f 2.8 version.