Canon Patent For CN-E 20-100mm f/2.8 and 20-130mm f/2.8-3.5 Cine Lenses

Canon filed a new patent in Japan. The new patent describes a new CN-E 20-100mm f/2.8 and 20-130mm f/2.8-3.5 lenses for Cinema products.

Both Canon lenses are standart zoom models features maximum F2.8 aperture. The patent for the 20-130mm seems to share the same optical formula which has an aperture between f/2.8-3.5.

We can expect these new cinema lenses for this fall as the EOS C300 Mark II will start shipping.

Canon CN-E 20-100mm f/2.8 and 20-130mm f/2.8-3.5 Cine Lenses Patent

• Patent Publication No. 2015-18083
  • 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

via Egami