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Wednesday, August 12, 2015

Canon Patents - CN-E 20-100mm and CN-E 20-120mm Lens




The Japanese photography blog, Egami has uncovered two more Canon patents for Cine lens - CN-E 20-100mm T2.8 and a CN-E 20-120mm T2.8-T3.5. Additional patents were discovered a few days ago. Once the Canon EOS C300 Mk II camcorder starts shipping in earnest, we may see additional Cinema EOS lens announcement.

Patent Publication No. 2015-18083 (Google Translated)

  •     Published 2015.1.29
  •     Filing date 2013.7.10

Example 1

  •     Zoom ratio 6.00
  •     Focal length 21.00 87.93 125.94
  •     F number 2.77 2.77 3.66
  •     Half angle of 35.54 9.68 6.79
  •     Image height 15.00
  •     Overall length of the lens 314.76
  •     BF 50.03

Example 2

  •     Zoom ratio 5.00
  •     Focal length 20.00 69.46 100.00
  •     F number 2.76 2.77 2.77
  •     Half angle of 36.50 12.03 8.42
  •     Image height 14.80
  •     Overall length of the lens 294.44
  •     BF 50.07

Canon patents

  •     Positive and negative positive and negative positive five-group zoom
  •     Inner focus (part of the first group)
  •     Inner zoom

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