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Monday, February 16, 2015

Canon Patent : External Image Stabilization Unit




Egami, the Japanese photography blog has uncovered a Canon patent, showing an optional image stabilization unit that is external to a lens, without changing its focal length.

Patent Publication No. 2015-28555 (Google Translated)

  •     Published 2015.2.12
  •     Filing date 2013.7.30

Example 1a (master lens only)

  •     Focal length 392.50
  •     F-number 2.92
  •     Half angle of 3.16
  •     Image height 21.64
  •     Overall length of the lens 379.64
  •     BF 41.57
  •     Effective diameter of the front lens 135.72mm
  •     Lens configuration 8 groups nine

Example 1b (anti-vibration converter mounted state)

  •     Focal length 392.50
  •     F-number 2.92
  •     Half angle of 3.16
  •     Image height 21.64
  •     Overall length of the lens 379.64
  •     BF 41.56
  •     Effective diameter of the front lens 135.72mm
  •     Lens construction 12 groups 15 sheets

Canon Patent

  •     3-group configuration of positive and negative positive
  •     Inner focus (the second group)
  •     The anti-vibration converter can be inserted on the object side of the third group

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