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Patent: A Canon 10mm f/2.8 Rectilinear Full Frame Lens

Patent: A Canon 10mm f/2.8 Rectilinear Full Frame Lens

Canon has filed a patent for the word’s widest rectilinear (non fisheye) lens, a 10mm f/2.8.  A couple of years ago, this would have sounded crazy, but with the recent introduction of the 11-24mm f/4 L, it’s now quite plausible, if not inevitable.

Translation: Explanation and self-interpretation of the patent literature

  • Patent Publication No. 2015-102620
    • Published 2015.6.4
    • Filing date 2013.11.22
  • Example 3
    • Focal length f = 10.30mm
    • Fno. 2.88
    • Half angle of view ω = 64.54 °
    • Image height 21.64mm
    • Lens length 124.58mm
    • BF 38.00mm
    • Effective front lens system 59.00mm
    • Lens configuration 11 group 16 sheets
    • Aspherical four sides four
    • Super UD 1
    • UD 1

You see, it’s much easier to make a prime lens at this kind of extreme angle, than it is to make a zoom.  Before the 11-24, we had the 16-35mm zoom and the 14mm f/2.8 prime.  It makes sense for Canon to create something wider and faster than the new zoom, just as they did with the 14mm prime when the 16-35 came out.

As for when we might see such a lens….? I doubt it would be soon.  Canon files a lot of patents, and there are far more obvious lenses to introduce at the moment.  We’ll keep an eye on this one, but if it does appear, I wouldn’t expect it for a few years.

 

Via: CR

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