Canon registered patent application number P2021167603 registered April 24, 2023. Four ens embodiments were registered.
- RF 15-70mm F2.8-4 IS
- RF 15-70mm F4 IS
- RF 15-85mm F2.8-5.6 IS
- RF-S 16-85mm F2.8-5.6 IS
Example 1: 15-70mm F4
- Zoom ratio 4.40
- Focal length 15.45 36.03 67.94
- F number 4.12 4.12 4.12
- Half angle of view (°) 41.27 19.59 10.60
- Image height 12.66 13.66 13.66
- Lens length 100.14 108.00 120.00 120.04
- Back focus 37
Example 2: 15-70mm F2.8-4
- Zoom ratio 4.40
- Focal length 15.45 36.49 68.04
- F number 2.88 3.86 4.12
- Half angle of view (°) 41.38 19.53 10.61
- Image height 12.66 13.66 13.66
- Total length of lens 100.32 110.41
- 1.7 1.6 1.6 1.6 1.6 118
- Back focus 15.59
Example 3: 15-85mm F2.8-5.6
- Zoom ratio 5.42
- Focal length 15.45 36.29 83.77
- F-number 2.88 4.00 5.80
- Half angle of view (°) 41.36 19.65 8.71
- Image height 12.66 13.66 13.66
- Lens length 101.54 1.1 2.35
- Back focus 101.54 1.26 1.26 231 16.91
Example 4: 16-85mm F2.8-5.6
- Zoom ratio 5.09
- Focal length 16.45 36.35 83.81
- F number 2.88 4.00 5.80
- Half angle of view (°) 39.72 20.12 8.62
- Image height 12.66 13.66 13.66
- Lens length 104.42 1.2 1.2 114.62
- Back focus 104.42 1.2 12.4 114.62 32 15.06
