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| Canon CinemaEOS line of CN-E lens |
Egami, the Japanese photography blog has uncovered two CN-E lens patent. The first being a compact zoom CN-E 15.5-47 T2.8, announced by Canon in 2012. The second optical formula in the patent is a CN-E 18-85 T2.8 lens. The other compact zoom lens in the CinemaEOS lineup is the CN-E 30-105 T/2.8. For a complete list of announced Canon Cinema Lens, click here.
Patent Publication No. 2015-4917 (Google Translated)
- Published 2015.1.8
- Filing date 2013.6.24
Example 1
- Zoom ratio 2.80
- Focal length 16.00 29.68 44.80
- F number 2.80
- Half angle (in degrees) 43.15 26.81 18.51
- Image height 15.00
- Overall length of the lens 263.54
- BF 39.04
Example 2
- Zoom ratio 4.50
- Focal length 18.50 45.61 83.25
- F number 2.80
- Half angle (in degrees) 39.04 18.20 10.21
- Image height 15.00
- Lens length 263.78 263.78 263.78
- BF 46.93 46.93 46.93
Canon patents
- 5-group zoom of positive and negative negative-positive-positive
- Inner focus (part of the first group)
- Inner zoom
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