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    Canon Patent Application: Canon RF Super Zooms

    By 11 Comments2 Mins Read Canon Patents
    JPA 506005834 i 000002 1536x518 - Canon Patent Application: Canon RF Super Zooms

    Back in the Canon EOS EF days, Canon made several large super zooms, mainly the Canon EF 100-300mm f/5.6L, and the Canon EF 35-350mm f/3.5-5.6L USM. But outside of the consumer Canon RF 24-240mm f/4-6.3 IS USM, they haven't dipped into that segment of the market too heavily yet.

    In this patent application (2024-005834), we have several longer superzooms that Canon may be exploring. From looking at the embodiments I would suggest that these lenses would be more prosumer or professional simply because they have a full image circle from wide to telephoto and their speeds are faster than what we've seen lately from consumer-grade zooms. I'm a little torn as to which one I like best, the 20-240mm I find to be very intriguing.

    Canon RF 24-300mm F4-5.6

                   Wide-angle Intermediate Telephoto 
focal length     24.72       83.10       291.00
F number          4.12        5.10         5.77
Angle of view    37.35       14.59         4.25 
Image height     21.64       21.64        21.64
Lens length     175.00      216.95       258.90
BF               13.81       51.78        68.61

    Canon RF 24-400mm F4-5.6

                   Wide-angle Intermediate Telephoto
focal length     24.72      100.11       390.00
F number          4.12        5.10         5.77 
Angle of view    37.35       12.19         3.18 
Image height     21.64       21.64        21.64 
Lens length     180.00      240.04       300.09 
BF               14.00       58.23        86.92

    Canon RF 20-240mm F4-5.6

                   Wide-angle Intermediate Telephoto
Focal length     20.60       72.53       240.00
F number          4.12        5.20         6.30
Angle of view    42.48       16.61         5.15 
Image height     21.64       21.64        21.64
Lens length     174.99      229.99       284.99
BF               14.00       63.22        81.63

    As with all patent applications, these may never get into an actual patent or even a product, but it's a way of us looking into what Canon is researching.

    Japan Patent Application 2024-005834

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    11 comments

    1. Oh my goodness, a RF 24-400mm f5.6. That's your one lens on holiday / mini safari lens right there. Talk about super-versatile! An effective 35-650mm f5.6 lens on RFs! Sign me up and a R7 tomorrow! Forget your RF 100-500 f7.1 LIS, this lens would be the one to get on on both Rf and Rfs mounts!
    3. I know it has been discussed here a few times, but a proper L-series replacement for the 28-300mm F/3.5-5.6L would be rather exciting. Personally, I never gave much consideration for a lens like this until I was shown the versatility of that lens and I went on to buy the RF 24-240 for myself. While it certainly won’t win any optical awards, its versatility made it extremely valuable for me to use at some events I shoot. Perhaps we will see one of these lenses hit the shelf? I would love for it to be the 24-300, but both other options are enticing as well!
    4. I wonder how good such an extreme zoom like the 24 - 400 could be.
      I have some reasonable doubts...:unsure:
      Certainly would have some compromises, but could be less than previous efforts.
      As the 24-105 f/2.8 is showing, Canon can now make a 4X zoom nearly equal in image quality to a 2.5X zoom.
    5. Certainly would have some compromises, but could be less than previous efforts.
      As the 24-105 f/2.8 is showing, Canon can now make a 4X zoom nearly equal in image quality to a 2.5X zoom.
      If you look at their broadcast lenses, they can make 10x zooms at good quality as well. It’s just going to cost you a lot more money :)
    7. I know it has been discussed here a few times, but a proper L-series replacement for the 28-300mm F/3.5-5.6L would be rather exciting. Personally, I never gave much consideration for a lens like this until I was shown the versatility of that lens and I went on to buy the RF 24-240 for myself. While it certainly won’t win any optical awards, its versatility made it extremely valuable for me to use at some events I shoot. Perhaps we will see one of these lenses hit the shelf? I would love for it to be the 24-300, but both other options are enticing as well!
      I'd give some consideration to a high-quality RF 24-300mm zoom. I had the EF 28-300L for a while, and though it was convenient I found that I got better IQ from the combination of the 24-105/4L and 70-300L (I sold the 28-300L, but I had bought it used and ended up selling it for more than I paid).

      The patent length for the 24-300mm is about the same as the EF 28-300L (shorter when retracted, slightly shorter when extended but about the same distance from the sensor), to me that suggests if made into a product it would likely be an L lens (there was a non-L EF 28-300mm that was much smaller).
    8. I wonder how good such an extreme zoom like the 24 - 400 could be.
      I have some reasonable doubts...:unsure:
      Same here! I was never a fan of super zooms.
      Too much of a compromise of size, price and IQ.
      But with the 24-240 already available, only the 24-400 could make it to the market.
      But I'm not part of that market ;)
    9. Same here! I was never a fan of super zooms.
      Too much of a compromise of size, price and IQ.
      But with the 24-240 already available, only the 24-400 could make it to the market.
      But I'm not part of that market ;)
      An RF 24-400 f/4-5.6 would get people to stop complaining about dark aperture zooms.
      Then they could go back to complaining about outrageous prices.
    10. Love these. The 24-300 looks like a production possibility and matches as a replacement for venerable 28-300. Only wish(es) 24-300 be constant base aperture like a 24-300 F4 and take extenders.

      The 28-300 is 7.8 inches long and weighs 3.7lb while the 300 f4 is 8.7 inches long and weighs 2.6 lb, wonder what would constant F4 setup be like.

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