Patent: Canon EF 28-560mm f/2.8-5.6
By| May 20, 2016
A patent for a super zoom optical formula from Canon has appeared. We heard a few months ago that Canon was working on a replacement for the EF 28-300 f/3.5-5.6L IS. This optical formula is for a truly impressive EF 28-560mm f/2.8-5.6 super zoom. The likelihood of such a product? I’m not sure, as the lens would be quite large in size.
Patent Publication No. 2016-80973 (Google Translated)
- 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
I looked a few times to make sure this idea wasn’t for a smaller sensor PowerShot camera, which it isn’t. This is for a full frame DSLR.