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