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
