Canon filed several new prime lens patent in Japan with image stabilizer feature. These are EF 85mm f/1.8 IS, EF 100mm f/2 IS, EF 135mm f/2.8 IS.
Description and self-interpretation of the patent literature
- Patent Publication No. 2014-10283
- Publication date 2014.1.20
- Filing date 2012.6.29
- Example 1
- Focal length f = 85.56mm
- Fno. 1.86
- Angle of view 2ω = 28.4 °
- Image height Y = 21.635mm
- Example 2
- Focal length f = 102.06mm
- Fno. 2.00
- Angle of view 2ω = 23.9 °
- Image height Y = 21.635mm
- Example 3
- Focal length f = 131.00mm
- Fno. 2.80
- Angle of view 2ω = 18.8 °
- Image height Y = 21.635mm
- Canon patents
- Positive and negative positive
- Inner Focus (group 2)
- (Part of the third group) antivibration
via: EG
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