A patent showing an optical formula for a Canon 15-75mm f/2-5.6 for what appears to be an APS-C fixes lens application has appeared.

Could Canon be readying a new APS-C PowerShot camera?

More after the break.

Patent Publication No. 2016-126226

  • Published 2016.7.11
  • Filing date 2015.1.7

Example

  • Zoom ratio 4.72
  • Focal length 15.60 33.30 73.60
  • F-number 2.06 3.91 5.76
  • Half angle of view (degrees) 36.01 22.30 10.51
  • Image height 11.34 13.66 13.66
  • Overall length of the lens 85.91 88.09 110.00
  • BF (in air) 6.28 16.31 22.07
  • Inner focus (Group 5)
  • Anti-vibration (group 4)
  • Patent Publication No. 2016-126226
  • Published 2016.7.11
  • Filing date 2015.1.7

Example

  • Zoom ratio 4.72
  • Focal length 15.60 33.30 73.60
  • F-number 2.06 3.91 5.76
  • Half angle of view (degrees) 36.01 22.30 10.51
  • Image height 11.34 13.66 13.66
  • Overall length of the lens 85.91 88.09 110.00
  • BF (in air) 6.28 16.31 22.07
  • Inner focus (Group 5)
  • Anti-vibration (group 4)

The patent includes various focal length combinations and you can read about them over at Egami.

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