Canon 18-200mm APS-C and 28-200mm Full Frame Lens Patent

Egami has discovered two new Canon patents for super zoom lenses. One of the lenses Canon filed patent for APS-C cameras (18-200mm f/3.5-5.6), the other one is for full-frame (28-200mm f/3.5-5.6) cameras.

Both lenses are image stabilized and most probably to use for future kit lenses.

Canon-super-zoom-patent

Canon 18-200mm and 28-200mm Super Zoom Lenses Patent Details

  • Patent Publication No. 2013-97184
    • Publication date 2013.5.20
    • Filing date 2011.11.1
  • Example 1
    • Zoom ratio 10.39
    • Focal length f = 18.60-60.40-193.27mm
    • Fno. 3.48-4.98-5.88
    • Half angle ω = 36.27-12.74-4.04 °
    • Image height 13.65mm
    • 144.58-176.50-208.42mm overall length of the lens
    • BF 38.09-63.96-77.06mm
    • 16 pieces of 13-group lens configuration
    • Four four-sided aspherical
    • The effective diameter of the front lens 55.82mm
    • MOD 0.5m
  • Example 3
    • Zoom ratio 6.69
    • Focal length f = 28.90-76.87-193.28mm
    • Fno. 3.60-5.27-5.88
    • Half angle ω = 36.82-15.72-6.39 °
    • Image height 21.64mm
    • 144.56-176.58-208.59mm overall length of the lens
    • BF 38.00-66.95-76.98mm
    • 15 pieces of 11-group lens configuration
    • Four four-sided aspherical
    • The effective diameter of the front lens 62.81mm
    • MOD 0.5m
  • Canon patent
    • 5-group zoom positive and negative negative positive positive
    • Inner Focus (third group)
      • Because it is possible to reduce the beam effective diameter of the first group, can be miniaturized optical system
    • Image stabilization