Patent: Lots of fast RF prime lens optical formulas

    By 69 Comments1 Min Read Canon Patents
    rfprimepatents - Patent: Lots of fast RF prime lens optical formulas

    Keith over at Northlight Images has uncovered a patent at the USPTO that shows Canon working on a lot of fast RF prime lenses.

    The optical formulas in this patent include:

    • Canon RF 50mm f/1.8
    • Canon RF 80mm f/1.4
    • Canon RF 85mm f/1.4
    • Canon RF 85mm f/1.8
    • Canon RF 100mm f/2
    • Canon RF 135mm f/2
    • Canon RF 300mm f/2.8

    These obviously won't all become consumer products, but I think it shows Canon is working on longer fast primes for the RF mount.

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    69 comments

    1. Still hoping for:
      A 135 f/1.8 (like the Sigma & Sonys!)
      A lightweight 120-300 f/2.8 (+ 2x of this zoomrange) etc...
      And some new DO lenses! (A newer 400 4.0 II...with less then 3,3m focus distance!)
    2. ******* unless that 300mm is f/1.4 and only weighs 64g. It also needs to be smaller than the 40mm pancake. I've seen a few YouTube videos about The Bridge over the River Kwai, so I know a thing or too about engineering. If Canon don't do this, then it's clear they are simply trying to protect the feelings sales of their bigger white lenses....
    4. Reminder before the complaints roll in...
      The examples in the patent just cover potential designs that fit a certain design principle - they are just optical desigs, not full lens designs.

      There are lenses I want too, but they don't fit the examples n the patent application ;-)
    5. ******* unless that 300mm is f/1.4 and only weighs 64g. It also needs to be smaller than the 40mm pancake. I've seen a few YouTube videos about The Bridge over the River Kwai, so I know a thing or too about engineering. If Canon don't do this, then it's clear they are simply trying to protect the feelings sales of their bigger white lenses....
      With their new blue diamond material front element, I think they can accommodate you. :LOL:
    6. ******* unless that 300mm is f/1.4 and only weighs 64g. It also needs to be smaller than the 40mm pancake. I've seen a few YouTube videos about The Bridge over the River Kwai, so I know a thing or too about engineering. If Canon don't do this, then it's clear they are simply trying to protect the feelings sales of their bigger white lenses....

      We know they're holding back on the 1-1000mm f/1.0 superzoom that fits in the unused card slot when not in use, you know, to protect their other lenses.
    7. With their new blue diamond material front element, I think they can accommodate you. :LOL:
      The blue diamond material is actually thermal paste designed to passively cool the R5 and allow 3 weeks continuous recording in 8K.
    8. The 80 and 85mm f~1.4 don’t make much sense after the near perfect RF 85mm f~1.2

      That depends...perhaps they're aimed at a much lower tier similar to the EF non L lenses.
    11. The 80 and 85mm f~1.4 don’t make much sense after the near perfect RF 85mm f~1.2
      One may argue that a $1800 85/1.4 L lens could sell a tad better than a much larger and heavier $3000 85/1.2? :)
    13. Canon RF 300mm f/2.8 , could this be the first of the big one whites for wildlife? Want to see the 400mm F2.8 and 500mm F4

      I am expecting the RF 300 and 500 at the same time. 300 is lovely for some wildlife but I always need to crop in with mine.
    14. One may argue that a $1800 85/1.4 L lens could sell a tad better than a much larger and heavier $3000 85/1.2? :)

      I'd preorder a 85mm f/1.4 on day one if it was smaller and cheaper than the 85 1.2. I love the EF 85 F/1.4, and was so close to buying one when the RF mount was announced and decided against it to start moving towards RF lenses.

      I am half tempted to get the 85 1.2, but I think I would get more use out of a 1.4. A lot of my portraits with flash are stopped down anyway, but I'd still like something a little faster than the F/2 for lowlight. Portraits aren't my main source of income and I often use a 70-200 or 24-70, so it'd hard to justify the 1.2.
    15. The 80 and 85mm f~1.4 don’t make much sense after the near perfect RF 85mm f~1.2

      I think there's room for an RF 85mm f/1.8 IS, which would benefit from being smaller, lighter, and cheaper.
    17. In terms of which of these might actually become products in the near(ish) future I'll say:


      Canon RF 50mm f/1.8 - Obviously yes
      Canon RF 80mm f/1.4 - Nope
      Canon RF 85mm f/1.4 - Nope
      Canon RF 85mm f/1.8 - More Nope
      Canon RF 100mm f/2 - I'm going to say no
      Canon RF 135mm f/2 - Maybe
      Canon RF 300mm f/2.8 - Yes

      I know some people want a 135mm f/1.8 or 1.4 but the EF 135 2.0 has always been a spectacular lens, and part of this is due to the relatively small size and low weight. Not sure I'd want a more expensive and heavier version.
    18. Perhaps, but we don’t usually see that aperture on non L lenses.

      My first thought was, wait a minute, I have one of those, it can't be uncommon.

      Then I realized I was thinking of my 50 mm f/1.4, which of course is distinctly NOT an 85mm. And it's certainly not like my 85mm f/1.8; similar logic. (See "A is A" for further explanation. :D ) Yes, an 85mm f/1.4 is probably too close to the f/1.2 to make much sense...unless it really is some sort of new mid-range option (oh, say about $1000-1200); even then, it might not be distinct enough.

      So yeah, never mind what I said. :)
    19. The 80 and 85mm f~1.4 don’t make much sense after the near perfect RF 85mm f~1.2

      Cost and Size... a lineup always need 1.4 and 1.8 lenses.
      Canon EF as 85mm 1.2, 1.4, and 1.8 So it makes perfect sense.

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