Canon has patented a new optical design for an impressive EF 28-560mm f/2.8-5.6 super zoom lens.
The patent application describes a 20x optical formula super zoom optic designed for Canon full frame DSLRs. and this patent is also a possible replacement model for this one.
Canon’s current super zoom lens is the EF 28-300mm f/3.5-5.6L IS and the rumor mill has known for some time that Canon was working on a replacement to this model and this could be it.
Canon EF 28-560mm f/2.8-5.6 Lens Patent
The optic provides an aperture range of f/2.8 to f/5.6 throughout the focal range. Here are the patent details translated below.
Patent Publication No. 2016-80973
- Published 2016.5.16
- Filing date 2014.10.21
- Zoom ratio 18.78
- Focal length 28.80 139.49 540.91
- F-number 2.88 4.77 5.88
- Half angle of view (degrees) 36.91 8.82 2.29
- Image height 21.64
- The total lens length 298.13 341.13 398.13
- BF 44.99 76.94 116.58
- Close range 700mm
- The effective diameter of the front lens 109.04mm
- Lens configuration 15 group 21 sheets
- Aspherical surface 7 five
- UD 1 sheet
- Positive and negative grain positive and negative polarity of the 6-group zoom
- Inner focus (1 part of Group 3)