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Canon Patent For New EOS M Pancake Lenses (18-40, 18-55, 10-20, 9-18)

EOS M Pancake

EOS M Pancake

Egami (tranlated) spotted a patent filed by Canon that appears to refer to new pancake lenses for the EOS M system18-40mm f/3.5-5.6, 18-55mm f/4-8, 10-20mm f/4-5.6, and 9-18mm f/4-5.6.

  • Patent Publication No. 2014-6275
    • Publication date 2014.1.16
    • Filing date 2012.6.21
  • Example 1
    • Zoom ratio 2.28
    • Focal length f = 18.10-29.78-41.20mm
    • Fno. 3.60-4.70-5.88
    • Half angle ω = 36.92-24.55-18.27 °
    • Image height Y = 13.60mm
    • 54.22-49.85-51.81mm lens length
    • BF 0.50mm
  • 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
  • Example 8
    • Zoom ratio 1.91
    • Focal length f = 10.30-15.00-19.70mm
    • Fno. 3.90-4.83-5.76
    • Half angle ω = 52.98-42.31-34.74 °
    • Image height Y = 13.66mm
    • 58.84-53.45-52.25mm lens length
    • BF 0.50mm
  • Example 10
    • Zoom ratio 1.91
    • Focal length f = 9.27-13.49-17.71mm
    • Fno. 4.12-4.93-5.76
    • Half angle ω = 55.84-45.36-37.65 °
    • Image height Y = 13.66mm
    • 60.98-55.27-53.91mm lens length
    • BF 0.50mm
  • Canon patents
    • The possible vibration damping by the second lens group
    • Feeding whole, front focus, focusing, rear focusing, etc.
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