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External Image Stabilisation Unit from Canon

 

Stabilisation Unit

A new news has been placed over the sites told that Canon has a new patent for External Image Stabilisation Unit (pics above). However, the unit can easily be fitted between camera body and the lens, the same way that you always do with the teleconvertor.

The present invention, users vibration reduction function or lighter or selectable according to the application, in addition to being used as an optical system having a vibration reduction converter, an optical system having a vibration reduction function, a vibration reduction function can also be used as a commercial advantage that the two systems can be Heibai by diverting a large portion of the component with no lightweight optics.
  • Patent Publication No. 2015-28555
    • 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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