Egami has uncovered a Canon patent for a super zoom lens, the EF 28-560mm f/2.8-5.6. I have reported earlier about Canon's plan on releasing the EF 200-600mm lens some time in 2017. This new glass will be a nice addition or replacement to the current EF 28-300mm f/3.5-5.6L IS super zoom, which is one of my favorite glass for wildlife photography. If Canon does decided to release this lens, it will be rather large and heavy because the current EF 28-300mm glass already weighs almost 3.7 pounds. You can see my equipment bag and see my works on MichaelDanielHo.com
In July, I reported Canon filed a 'crazy' patent for a EF 40-800mm f/4.5-5.6 lens. A patent is just that, a claim on some intellectual property. It is a long way from being a prototype, let alone a marketable product.
Patent Publication No. 2016-142795
- Published 2016.8.8
- Filing date 2015.1.30
Example 1
- Zoom ratio 18.86
- Focal length 28.80 119.57 543.20
- F-number 2.88 4.56 5.88
- Half angle of view (degrees) 36.91 10.26 2.28
- Image height 21.64 21.64 21.64
- The total lens length 281.07 331.07 385.01
- BF 53.05 61.31 40.00
- The effective diameter of the front lens 120.00
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