New Canon patent discloses a 16-28mm f/2.8 lens for a future Full Frame mirrorless

A newly published patent application discloses the design of a wide angle zoom lens for the future Canon Full Frame mirrorless system cameras. Those are the lens specs:

Zoom ratio: 1.67
Focal length: 16.48 – 27.44 mm
F number: 2.88
Half angle: 52.70 – 38.25
Image height: 21.64 mm
Back focus: 12.33 – 10.00 mm

via hiLowsNote