Canon has filed patent for a wide angle flourite concept. Egami discovered two new Canon patents. Such a patent could be part of a new ultra-wide zoom lens, EF 14-24mm or a replacement to the EF 16-35mm f/2.8 IS II. Egami also thinks it’s possible this patent could be for the EF-M mount. You can read the full patent here.
Patent Publication No. 2013-37339
- 2013.2.21 Release Date
- Filing date 2011.7.12
Example 1
- Zoom ratio 1.00
- Focal length f = 1.00mm
- Fno. 2.90
- Half angle of view ω = 56.66 °
- Image height Y = 1.52mm
- 9.51mm length lens
- BF 2.82mm
- 6 aspherical surfaces, the first surface 25
- Punctually
Example 3
- Zoom ratio 2.06
- 2.06mm – f = 1.00 focal length
- Fno 2.79 -. 4.00
- Half angle of view ω = 51.27 – 32.82 °
- 1.33mm – Y = 1.25 image height
- 8.55mm – 8.79 length lens
- BF 2.41 – 3.46mm
- Aspheric first surface, the fifth surface, the first surface 26
- Positive and negative positive negative
Example 6
- Zoom ratio 1.00
- Focal length f = 1.00mm
- Fno. 2.90
- Half angle of view ω = 87.35 °
- Image height Y = 21.60mm
- 9.51mm length lens
- BF 2.82mm
- 6 aspherical surfaces, the first surface 25
- Punctually
