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Wednesday, January 22, 2014

Canon Patents : 85mm f/1.8 IS,100mm f/2 IS, 135mm f/2 IS


Canon EF 135mm f/2L Lens

Egami, the Japanese blog, reported on new Canon patents for three popular telephoto lenses with image stabilization. The three Canon lenses expected to receive IS in their upcoming replacement are the EF 135 f/2, the 85mm f/2 and 100mm f/2.

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 2? = 28.4 °
  • Image height Y = 21.635mm

Example 2

  • Focal length f = 102.06mm
  • Fno. 2.00
  • Angle of view 2? = 23.9 °
  • Image height Y = 21.635mm

Example 3

  • Focal length f = 131.00mm
  • Fno. 2.80
  • Angle of view 2? = 18.8 °
  • Image height Y = 21.635mm

Canon patents

  • Positive and negative positive
  • Inner Focus (group 2)
  • (Part of the third group) antivibration

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