New Patent: Canon EF 600mm F/4 DO IS USM Lens

Canon EF 600mm f4 DO lens patent

Canon has just filed a new patent: EF 600mm f/4 DO IS USM Lens. Canon released their  EF 400mm f/4 DO IS II USM lens last year and this new patent is for another super telephoto “DO” lens.

  • Patent Publication No. 2015-11171
    • Published 2015.1.19
    • Filing date 2013.6.28
  • Example 2
    • Focal length 588.30mm
    • Fno. 4.12
    • Angle of view 2.11 °
    • Image height 21.64mm
    • Lens length 397.80mm
    • BF 2.02mm
    • Positive ShiboTadashi
    • Inner focus
    • Vibration control

Source: EG

Read More Canon Lens Patent

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