Canon EF-M Lens 18-40 lens patent surfaced over the web, usually it take two to three years when a lens / camera patent becomes reality aka consumer product.
- Patent Publication No. 2014-6275
- Publication date 2014.1.16
- Filing date 2012.6.21
- Example 7
- Zoom ratio 3.00
- Focal length f = 18.10-37.01-54.30mm
- Fno. 4.20-6.20-8.20
- Half angle ω = 36.92-20.17-14.06 °
- Image height Y = 13.60mm
- 64.74-56.63-62.13mm lens length
- BF 0.50mm
src-egmai
