Egami, the Japanese Photography Blog has spotted a Canon Patent for the EF 35mm f/1.4L II lens. The filed patent appears to refer to the successor of the Canon EF 35mm f 1.4L USM which is released in back 1998 and currently priced for $1,479 at Amazon.
This is not the first patent for a 35mm lens in the lineup. Previously there were rumors that Canon was field-testing a EF 35mm f/1.4L II lens. Also included in the patent are formulas for a 14mm f/2.8 and a 24mm f/2.8. Below are the translated text by Google of the patent.
Canon Filed a Patent for EF 35mm f/1.4L II Lens
Patent Publication No. 2013-195747
- Publication date 2013.9.30
- Filing date 2012.3.21
Example 1
- Focal length f = 14.17mm
- Fno. 2.89
- Half angle ? = 56.78 °
- Image height 21.64mm
- The overall length of the lens 133.50mm
- BF 40.23mm
- 14 pieces in 11 groups Lens Construction
- 2 pieces of 2 aspherical surface
- The effective diameter of the front lens 69.96mm
Example 2
- Focal length f = 24.50mm
- Fno. 2.80
- Half angle ? = 41.45 °
- Image height 21.64mm
- The overall length of the lens 92.07mm
- BF 38.07mm
- 8 group 9 lenses configuration
- 2 pieces of 2 aspherical surface
- The effective diameter of the front lens 34.58mm
Example 3
- Focal length f = 35.50mm
- Fno. 1.45
- Half angle ? = 31.36 °
- Image height 21.64mm
- The overall length of the lens 135.01mm
- BF 38.56mm
- 11 pieces Lens Construction 9 group
- One piece of one aspherical surface
- The effective diameter of the front lens 49.79mm
