Canon Patent For 10-22mm f/3.5-4.5 Lens With a Liquid Element

Egami has discovered  a new patent filed by Canon. The new patent describes a 10-22mm f/3.5-4.5 lens that features a liquid lens element in between all the glass.

This patent differs from the current EF-S 10-22mm with a liquid lens element that would be controlled by either electrical input or pressure. The lens is aimed at APS-C-sized DSLR cameras and offers a 35mm focal length equivalent of 16-35mm.

It is not the first patent of this kind filed by Canon and hard to say if such a lens will come to the market any time soon. See the patent details below.

Canon EF-S 10-22mm f/3.5-4.5 Lens Patent With a Liquid Element


  • Patent Publication No. 2014-145883 (Google Translated)
    • Published Date 2014.8.14
    • Filing date 2013.1.29
  • Example 4
    • Zoom ratio 2.07
    • Focal length f = 10.30-13.12-21.35mm
    • Fno. 3.23-3.62-4.63
    • Half angle ω = 52.86-46.03-32.50 °
    • Image height 13.60mm
    • The overall length of the lens 135.13-133.91-135.09mm
    • BF 0.15mm
  • Canon patents
    • And by varying the shape of the boundary surface, thereby changing the refractive power
    • Zooming, and has a refractive power element is positive, the element is negative
    • And reduce the variation of the curvature

via : Egami