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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