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A patent showing a 10-22 f/3.5-4.5 optical formula with a liquid element has shown up. I think it's safe to say that this isn't going to end up as a consumer product any time soon, but it's still pretty interesting.
- 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
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