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Gear Rumors

Canon Lens Leaks, 400mm F/4, 24-105mm STM, and 24mm F/2.8

By Anthony Thurston on September 11th 2014

Well, last night just before bed the 7D Mark II specs and image leaked, and I went to bed shortly after finishing that post. Apparently Canon’s lens announcements also leaked online sometime after I hit the sack, so here are the pics and specs for the upcoming lens announcements.

Canon EF 24-105 f/3.5-5.6 IS STM


  • One UD lens and two glass mold aspherical lens
  • AF drivent by stepping motor
  • Full-time manual focus
  • 4 stops IS
  • Maximum magnification is 0.3x
  • New kit lens for the EOS 6D

Canon EF 400mm f/4 DO IS II


  • Total length 232.7 mm
  • Weight is 2100 g
  • Third generation DO lens
  • One large-diameter UD lens
  • One large-diameter aspherical lens grinding
  • 4 stop IS
  • Special coating SWC
  • Dust and water resistant

Canon EF-S 24mm f/2.8 STM Pancake Lens


  • First EF-S pancake lens
  • 38.4 mm equivalent
  • High-precision glass molded aspherical lens
  • Full-time manual focus
  • Minimum focusing distance 0.16m
  • Maximum magnification is 0.27x
  • 22.8 mm height
  • 125g weight

So, overall – unless there is more that has not leaked – I think that this is a pretty underwhelming lens haul for Canon at Photokina. The 400mm will be awesome, but priced so high most will never get to use it. The 24-105mm looks like it will be a great kit lens, even if it looks plastic and not as good of build quality as the 24-105mm L version. The 24mm pancake looks sweet, but many will complain that it is EF-S only.

Personally, I am not impressed, with both these lenses and the 7D Mark II. The door is wide open in my mind for someone else to steal the show at Photokina.


What are your thoughts about these lens leaks? Do any of the lenses tickle your fancy? Leave a comment below!

[via Canon Watch]

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Anthony Thurston is a photographer based in the Salem, Oregon area specializing in Boudoir. He recently started a new project, Fiercely Boudoir to help support the growing boudoir community. Find him over on Instagram. You may also connect with him via Email.

Q&A Discussions

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  1. Michael Moe

    i want that 24mm f2.8 lens!!!

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  2. Michael Velardo

    What’s the problem with making the 24-105mm STM an L series lens? Canon appears to be moving backwards lately.

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  3. Jeff Morrison

    thanks for sharing

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  4. Austin Swenson

    Yeah I thought since they reduced the prices of a bunch of lenses that they might be doing some kind of refresh on at least a few, but you never know, they could be keeping something close to the vest and then drop an awesome bomb at photokina… Or so the canonites would hope.

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  5. Matthew Saville

    Like the previous major Canon lens announcement, I hope the excitement here will be in the pricing. Yes, this new 24-105 STM lens sounds like a dud compared to the 24-105 L, but what if it is priced at $499 or so, and has a flawless MTF chart? Same thing with the 24 EF-S. If it’s flawlessly sharp, and relatively affordable, they’ve got something here.

    Really the only problem is that Canon users feel let down because Canon isn’t blasting the world with multiple full-frame mirrorless cameras like Sony is. I understand that, but that’ll come soon enough IMO and in the meantime Canon has plenty of OVF peeps to keep happy, at all budget levels.


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  6. Stan Rogers

    That’s “apochromatic”, of course. (We Canadians learn to get good at ignoring the red squigglies, since our spelling doesn’t match any known spell-check dictionaries.)

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  7. Stan Rogers

    EF-S only is the only way it could be an SLR lens, 24mm and “pancake” all at the same time, unfortunately. Anything that doesn’t extend into the mirror box would need a more retrofocus design, which would mean that the lens has to extend further away from the camera body — especially if you want an image circle that covers a 24x36mm sensor. You can’t put a simple 24mm Tessar design 40mm away from the sensor and focus at infinity. People are just going to have to learn that disappointment is a part of life. Eventually. I hope. (Though the number of web postings demanding 10-600mm f/0.7 apachromatic, flat-field, macro-capable lenses for under $1000 leads me to believe that my hope is naïve, futile and wasted.)

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    • Matthew Saville

      Stan, I love your comments. Keep them coming!

      I hope Canon can quickly rise to the occasion of matching the image quality (specifically, the dynamic range and AA-less acuity) of the likes of the Nikon D5300, then we will have a real winner of an OVF system on our hands in the likes of the high-end rebels, for those who still want an OVF. (Personally, I do)


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    • Anthony Thurston

      Good point(s) Stan! I didn’t really think about that in regards to the 24mm Pancake. Still, should be a good lens for crop shooters, probably will pair well with the new 7D Mark II.

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    • Ralph Hightower

      With it being an EF-S lens, it won’t fit on my full frame Canon, however, the EF 40mm f2.8 STM looks like it’s “pancake” enough.

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    • Stan Rogers

      Ralph, the EF 40mm/2.8 STM is a simple Tessar-type design with a focal length about the same as the flange distance (the distance between the lens mount and the sensor). If it were anything other than (about) 40mm *and* f/2.8 (or slower), it couldn’t be as small and flat. Any faster, and it would need to be bigger to avoid vignetting. Any shorter, and it would need to be retrofocus. (The EF-S 24 is retrofocus too, but it doesn’t have a big enough image circle to cover full frame, and it needs to extend behind the lens mount.) Any longer, and it would need to be, well, longer. (Yes, Pentax has a tiny 70mm lens, but all of their not-40mm pancakes are designed for their exclusively-crop-sensor cameras and have limited maximum apertures. As a true telephoto lens, it can be shorter than the focal length would suggest, but that comes at the expense of the image circle.)

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  8. Hannes Nitzsche

    I agree… these lenses sound nice but that’s about all. I was blown away yesterday to read about the new samyang 12mm ff lens… now this a whopper… Canon really needs something big for photokina. Maybe the rumored 7DMkII specs are not all there is to this new body… Now it’s time to play that waiting game…

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