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    Home»Canon Patents»Patent: Canon RF 24-300mm f/4-5.6
    svg+xml;base64,PHN2ZyB2aWV3Qm94PScwIDAgNzI4IDEwMjQnIHhtbG5zPSdodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2Zyc+PC9zdmc+ - Patent: Canon RF 24-300mm f/4-5.6

    Patent: Canon RF 24-300mm f/4-5.6

    By Canon RumorsDecember 31, 201912 Comments1 Min Read Canon Patents
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    Canon continues to develop optical formulas for an RF mount superzoom, something that we'll likely see sooner than later. This patent shows an optical formula for an RF 24-300mm f/4-5.6. It's hard to say if this is an L lens, as they tend to be larger than their non-L counterparts.

    Canon RF 24-300mm f/4-5.6 embodiement:

    • Focal length: 24.72mm 90.83mm 290.86mm
    • F-number: 4.12 5.00 5.88
    • Angle of view: 41.19° 13.40° 4.25°
    • Image height: 21.64mm 21.64mm 21.64mm
    • Total lens length: 165.57mm 210.57mm 255.57mm
    • BF: 14.37mm 32.56mm 30.89mm

    Go to discussion...

    patent RF 24-300 f/4-5.6
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    12 comments

    1. jolyonralph
      December 31, 2019 at 7:39 pm
      As if the 24-240 wasn't bad enough.
      • Reply
      • 0
    2. shawn
      December 31, 2019 at 11:09 pm
      As if the 24-240 wasn't bad enough.

      The 24-240 is fine when corrected. I can only imagine this new lens is much larger which makes it less of consumer zoom.
      • Reply
      • 0
    3. criscokkat
      January 1, 2020 at 3:51 am
      I guess there's a chance this could be an L lens. It could be the RF lens equivalent of the 28-300L.
      • Reply
      • 0
    4. Antono Refa
      January 1, 2020 at 6:56 am
      As if the 24-240 wasn't bad enough.

      I haven't read the reviews of the RF 24-240mm and EF 28-300mm side by side, but IIRC the later's IQ justifies the 2.7x price difference. The later is an upgrade of the EF 35-350mm, so apparently it makes a profit, and might make one on RF as well.
      • Reply
      • 0
    5. Daner
      January 1, 2020 at 12:50 pm
      When traveling with checked baggage I bring my RF 24-105 and my EF 100-400 II (and the 1.4x extender), but when I am limited to carry-on only I just go with the smaller lens. The IQ and durability limitations of the 24-240 have kept it off my list so far. If this one deals effectively with both of those concerns while providing some additional reach, it could be a serious consideration for one-bag travel.
      • Reply
      • 0
    6. RobbieHat
      January 1, 2020 at 3:43 pm
      When traveling with checked baggage I bring my RF 24-105 and my EF 100-400 II (and the 1.4x extender), but when I am limited to carry-on only I just go with the smaller lens. The IQ and durability limitations of the 24-240 have kept it off my list so far. If this one deals effectively with both of those concerns while providing some additional reach, it could be a serious consideration for one-bag travel.

      My thoughts as well. This would be a great one lens solution for landscape photography when I have to lug gear for miles in a backpack.
      • Reply
      • 0
    7. jolyonralph
      January 1, 2020 at 7:24 pm
      I wish the superzoom concept would go more the other way, ie something like an RF 15-85 f/4. That would be a more useful travel lens for me than a 24-xxx
      • Reply
      • 0
    8. Nelu
      January 1, 2020 at 8:31 pm
      I wish the superzoom concept would go more the other way, ie something like an RF 15-85 f/4. That would be a more useful travel lens for me than a 24-xxx
      I guess it depends on what do you mean by "travel". I was doing a three-days backpacking trip in August with the 24-70 f/2.8 lens. I really would have loved to have the 24-270mm lens when we ran into the grizzly mama bear, with three cubs...
      • Reply
      • 0
    9. shawn
      January 2, 2020 at 5:28 am
      I guess it depends on what do you mean by "travel". I was doing a three-days backpacking trip in August with the 24-70 f/2.8 lens. I really would have loved to have the 24-270mm lens when we ran into the grizzly mama bear, with three cubs...
      I agree. I would take extra reach over wider angle of view on any and all conceivable trips. If I want a really wide shot I prefer to shoot a panorama at a narrower focal length as it has a much more natural look.
      • Reply
      • 0
    10. Antono Refa
      January 2, 2020 at 6:34 am
      I wish the superzoom concept would go more the other way, ie something like an RF 15-85 f/4. That would be a more useful travel lens for me than a 24-xxx

      I would love such a lens, but wonder what chances there for such a lens.

      IIRC, the experts on this site explained there are physical obstacles to designing zooms that cross the normal from wide to tele. Possibly it's easier to design one for a MILC?
      • Reply
      • 0
    11. Daner
      January 2, 2020 at 2:17 pm
      I wish the superzoom concept would go more the other way, ie something like an RF 15-85 f/4. That would be a more useful travel lens for me than a 24-xxx

      I would settle for an RF 15-70 f/4 (and an RF 100-400).
      • Reply
      • 0
    12. Optics Patent
      January 2, 2020 at 10:46 pm
      I used to be a superzoom fan but the RF 70-200 does the job with one pocket-sized wide prime like the RF 35mm 1.8. Or as wide as needed.

      The 24-240 cost $500 as kit lens with RP and gets little use unless light is good and lens changing isn’t desired.
      • Reply
      • 0

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