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Canon Patent for 12-32mm T3.5 and a 15-47mm T2.8 Cinema Lenses

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Canon has filed a new  in Japan for two Cinema lenses. The patent describes the 12-32mm T3.5 and 15-47mm T2.8 lenses designed for the EOS Cinema cameras.

The rumor mill is already in talks of the C300 Mark II and C500 Mark II Cinema EOS camcorders for the NAB 2015 show. We can expect at least one cinema lens announcement from Canon for the event.

See the patent details below.

Canon 12-32mm T3.5 and a 15-47mm T2.8 Cinema Lens Patent

canon-12-32mm-t3-5-and-a-15-47mm-t2-8-cinema-lens-patent

  • Patent Publication No. 2015-34858
    • Published 2015.2.19
    • Filing date 2013.8.8
  • Example 1
    • Zoom ratio 2.50
    • The focal length f = 12.50 18.75 31.25mm
    • Fno. 3.50
    • Half angle ω = 51.21 39.67 26.45 °
    • Image height Y = 15.5mm
    • Overall length of the lens 193.59
    • BF 42.84
  • Example 2
    • Zoom ratio 2.81
    • Focal length 16.00 26.88 45.00
    • Fno. 2.80
    • Half angle of 44.18 30.05 19.06
    • Image height Y = 15.5mm
    • Overall length of the lens 247.38
    • BF 43.27
  • Canon patent
    • Negative positive and negative positive 4-group zoom
    • Inner zoom (the second group)
    • Inner focus (rear group of the first group)

via Egami