I am not sure how many photographers will be interested in buying a new, non 'L' zoom lenses for their full frame camera but Canon has patented the EF 17-35mm f/4-5.6 IS STM design. It appears to be slow and may be more appropriate for the APS-C sensor cameras.
Canon EF 17-35mm f/4-5.6 IS STM USM lens
- Focal distance: 17.50 25.12 34.09
- F number: 4.00 4.85 5.88
- A half field angle (degree): 51.03 40.73 32.40
- Image height: 21.64 21.64 21.64
- Whole length of the lens: 130.88 128.52 134.05
- BF: 37.60 49.75 64.06
- Japan patent application 2017-161568
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