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Patent: Canon 3.6-255mm F2.8-7 w/ Built-in Extender for PowerShot

By Canon Rumors | December 25, 2016

Patent: Canon 3.6-255mm F2.8-7 w/ Built-in Extender for PowerShot

An interesting lens patent for a PowerShot camera has appeared, in the form of a Canon 3.6-255mm F2.8-7 lens with a built-in extender that can make the lens 2000mm f/10 when converted to 35mm.

Patent publication number 2016-212210 (Google translated)

  • Release date 2016.12.15
  • Application date 2015.5.7
  • Zoom ratio 66.07
  • Focal length 3.71 10.16 245.00
  • F number 2.90 4.99 7.07
  • Half angle of view (degree) 40.59 20.88 0.91
  • Lens total length 94.31 86.88 150.26
  • BF 9.45 16.24 9.56

Super telephoto (D)

  • Focal length 359.99
  • F number 10.39
  • Half angle of view (degree) 0.62
  • Lens total length 150.26
  • BF 3.56

With the PowerShot SX70 HS around the corner and recent patents showing 100x zoom optical formulas, this is likely part of that development process.

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