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Canon EF-M 18-40mm Lens Patent

Canon mirrorless lens patentCanon EF-M Lens 18-40 lens patent surfaced over the web, usually it take two to three years when a lens / camera patent becomes reality aka consumer product.

  • Patent Publication No. 2014-6275
    • Publication date 2014.1.16
    • Filing date 2012.6.21
  • Example 7
    • Zoom ratio 3.00
    • Focal length f = 18.10-37.01-54.30mm
    • Fno. 4.20-6.20-8.20
    • Half angle ω = 36.92-20.17-14.06 °
    • Image height Y = 13.60mm
    • 64.74-56.63-62.13mm lens length
    • BF 0.50mm

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