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Canon Files Patent For 17-85mm F/4-5.6 Image Stabilized Lens

Canon Files Patent For 17-85mm

New Canon patent spotted by Egami (translated). This time the patent is about a 17-85mm f/4-5.6 lens with image stabilization. According to the patent, chromatic aberrations are reduced by anomalous partial dispersion, which, in turn, is obtained using synthetic resin and the inorganic oxide fine particles.

  • Patent Publication No. 2013-25085
    • 2013.2.4 Release Date
    • Filing date 2011.7.21
  • Example 1
    • Zoom ratio 4.70
    • 37.33 – – 82.48mm f = 17.55 focal length
    • Fno 3.98 -. 5.06 – 5.64
    • Half angle of view ω = 37.89 – 20.10 – 9.40 °
    • Image height 13.66mm
    • 134.85 – – 156.62mm 119.65 overall length of the lens
    • BF 37.59 – 52.48 – 62.64mm
    • 18 images in 11 groups lens configuration
    • 2 UD glass sheets
    • One two-sided aspherical
    • 5-group zoom negative positive negative
    • Inner Focus (Group 2)
[via Egami]

 

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