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.