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    Canon Patent Application: Canon RF 35mm F1.4 and 26mm F1.4

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    JPA 506061921 i 000004 1536x518 - Canon Patent Application: Canon RF 35mm F1.4 and 26mm F1.4

    In this patent application (2024-061921), Canon is showing off some curious embodiments for some prime lenses.

    These are full-image circle primes with no image stretching so understandably they would be targetted as higher-end primes. Maybe Canon got tired of my whining on the subject and decided to shut me up.

    But what I found most curious is that the focal lengths are a bit odd being at 34mm (close enough to 35mm?) and also even more interesting is the embodiment of a 26mm lens. The 26mm of course sits right between Canon's usual focal lengths of 24 and 28mm.

    I'm also going to make a guess that these lenses also have a very small minimum focus distance as “close up” is mentioned frequently. But usually, it is stated in the embodiments as a magnification factor if Canon is applying for a macro lens patent. Canon also mentions that size is an important objective but these lenses are 4 inches long, which leads me to think that there's more than just a normal prime illustrated in these examples.

    Canon in their patent application writeup simply states;

     In recent years, imaging devices using solid-state imaging devices, such as digital still cameras, video cameras, surveillance cameras, broadcasting cameras, and silver halide photography cameras, have become more sophisticated. As an optical system used therefor, there is a demand for miniaturization of the entire focus group. Furthermore, there is a need for an optical system that can increase the imaging magnification when focusing from infinity to close range, while also being able to satisfactorily correct chromatic aberration, field curvature, etc. when shooting at the closest range. Additionally, with the shift to mirrorless large-format cameras, there is a demand for lenses with short back focus, small size, and large aperture. 

    Canon RF 26mm F1.4

    Focal length            26.62  
    F number                 1.44  
    Half angle of view (°)  39.10  
    Image height            21.64  
    Lens total length      131.96  
    BF                      20.00  

    Canon RF 35mm F1.4

    Focal length            33.87  
    F number                 1.44  
    Half angle of view (°)  32.57  
    Image height            21.64  
    Lens total length      131.26  
    BF                      16.49  

    As with all patent applications, this is a look into Canon's research, and may never end up in an actual product.

    Japan Patent Application 2024-061921

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    28 comments

    2. Did someone else noticed that Canon removed the ad they had on Facebook for the release this week of a new gear , and CanonRumors also deleted their post about it ? It’s no longer here
    3. A lot of people will be happy for f/1.4 primes to become reality.
      26 mm seems to be a pretty unusual FL but surely interesting :)
      The patent states a focal length of 26.62 mm, maybe Canon will round this up to 28 mm.
    4. The patent states a focal length of 26.62 mm, maybe Canon will round this up to 28 mm.
      I still don't understand this focal length.
      If you own a 24mm or a 28mm, why should you buy it? WA standard zooms start at 24 or 28mm, existing or future primes are -will certainly be- 24 and 28mm...
      Unless this lens is meant for a very specific purpose, I'm at a loss for what to do with this focal...
    6. If these do have ‘video features’ then canon needs to think about releasing some professional cine cameras with RF.
      These are full frame lenses but they don’t have a full frame cinema camera with RF.

      I think their departments need to talk to each other.
    8. A 26mm Prime would indeed be somewhat odd and not in accordance with our expectations. But remember, Zeiss has a 1.4/25mm Milvus wich also does not fit to the usual FL for FF. And 25mm Primes at least are common in cine-lenses (Arri, Zeiss, Cooke).
    9. A 26mm Prime would indeed be somewhat odd and not in accordance with our expectations. But remember, Zeiss has a 1.4/25mm Milvus wich also does not fit to the usual FL for FF. And 25mm Primes at least are common in cine-lenses (Arri, Zeiss, Cooke).
      And Hasselblad just introduced a 25mm lens for their ‘medium’ format as well.
    10. And Hasselblad just introduced a 25mm lens for their ‘medium’ format as well.
      To be fair, that has the same perspective as a 20mm lens, which is a lot more common (e.g. Sigma has a 20/1.4, Nikon and Sony have 20mm f/1.8s).
    11. If these do have ‘video features’ then canon needs to think about releasing some professional cine cameras with RF.
      These are full frame lenses but they don’t have a full frame cinema camera with RF.

      I think their departments need to talk to each other.
      I'm quite sure they do!
    12. A 26mm Prime would indeed be somewhat odd and not in accordance with our expectations. But remember, Zeiss has a 1.4/25mm Milvus wich also does not fit to the usual FL for FF. And 25mm Primes at least are common in cine-lenses (Arri, Zeiss, Cooke).
      Zeiss has a long 25mm tradition (Biogon, Milvus, Batis, Distagon). Same with 20-21mm lenses. Some companies prefer 20mm, Leica and Zeiss opt for 21mm, No reason, just a choice.
    13. Zeiss has a long 25mm tradition (Biogon, Milvus, Batis, Distagon). Same with 20-21mm lenses. Some companies prefer 20mm, Leica and Zeiss opt for 21mm, No reason, just a choice.
      Wich is btw also true for other Standard-FL. Remember all the various 55 und 58mm Primes - instead the "usual" 50mm. And of course the Portrait-FL is not always 85 mm like Canon, Zeiss and Nikon. Leica used to have 90mm - except the 80mm Summilux-R and the 75mm Summicron/lux-M. :)
    14. Wich is btw also true for other Standard-FL. Remember all the various 55 und 58mm Primes - instead the "usual" 50mm. And of course the Portrait-FL is not always 85 mm like Canon, Zeiss and Nikon. Leica used to have 90mm - except the 80mm Summilux-R and the 75mm Summicron/lux-M. :)
      75 Summilux M: :love::love::love::love::love:
      And the 60mm Macro Elmarit, the 180mm Apos, the 250, 280, 560 Telyts.
      So, if I think it over, why not an RF 26mm?
    16. If these do have ‘video features’ then canon needs to think about releasing some professional cine cameras with RF.
      These are full frame lenses but they don’t have a full frame cinema camera with RF.

      I think their departments need to talk to each other.
      I guess you're ignoring the R5C
    17. I guess you're ignoring the R5C
      We have 3 R5c cameras which have been our workhorses for years. But they we only supposed to see us through until a professional camera came out. It’s been 2 years. Our rigs a crazy to make it work as a good cine camera. Cage, rails, v-mount plate with cables, hdmi to sdi coverts with cables, useable monitors with cables. It’s great but it’s an absolute mess.
    18. The patent states a focal length of 26.62 mm, maybe Canon will round this up to 28 mm.
      Could be. But normally Canon would round this up to the "better side".
      A 382mm tele will become a "400mm".
      A 26 mm WA will become a "24 mm".
      We'll see, what patent will come to live at all.
    19. Zeiss has a long 25mm tradition (Biogon, Milvus, Batis, Distagon). Same with 20-21mm lenses. Some companies prefer 20mm, Leica and Zeiss opt for 21mm, No reason, just a choice.
      If Canon makes a full-frame 25 mm lens they call it 24.
      They use the exact focal length for APS-C lenses.
      I think Zeiss prefers to be exact.

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