Patent: EF 24-70 f/2.8L IS

Patent: EF 24-70 f/2.8L IS

New Patent
We’ve heard before that an EF 24-70 f/2.8L IS was in testing.

A patent has surfaced that has confirmed Canon testing such a lens. The Canon folks out there would be pretty accepting of such a lens.

  • Patent Publication No. 2013-182246
    • Publication date 2013.9.12
    • Filing date 2012.3.5
  • Example 1
    • Zoom ratio 2.75
    • Focal length f = 24.70-36.42-67.88mm
    • Fno. 2.91
    • Half angle ω = 41.22-30.71-17.68 °
    • Image height 21.64mm
    • 164.87-172.85-196.79mm overall length of the lens
    • BF 39.07-44.44-54.56mm
    • 20 pieces of 13-group lens configuration
    • Four four-sided aspherical
  • Example 2
    • Zoom ratio 2.76
    • Focal length f = 24.70-34.88-68.18mm
    • Fno. 2.91
    • Half angle ω = 41.22-31.81-17.61 °
    • Image height 21.64mm
    • 165.79-174.26-199.67mm overall length of the lens
    • BF 38.47-42.81-58.00mm
    • 20 pieces of 15-group lens configuration
    • Three 3 aspherical surface
  • Example 3
    • Zoom ratio 3.22
    • Focal length f = 24.70-39.67-79.43mm
    • Fno. 2.91
    • 41.22-28.61-15.24 ° angle of view
    • Image height 21.64mm
    • 161.98-171.74-200.99mm overall length of the lens
    • BF 38.35-46.17-57.64mm
    • 20 pieces of 13-group lens configuration
    • Four four-sided aspherical
  • Canon patent
    • 5-group zoom of positive and negative positive positive and negative
    • Antivibration (fourth lens group)

Source: [EG]

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