It looks like Canon is serious about the 17-70mm focal range for a new lens design as discovered by Canon News. This isn’t the first time we’ve seen mention of an RF 17-70mm lens, which leads us to believe we are likely to see this introduced at some point.
This would be a nice kit lens for a new entry-level EOS R camera body.
This patent also shows two similar EF designs.
Canon RF 17-70mm f/3.5-5.6 IS USM
Focal length: 17.40mm 34.99mm 67.97mm
F-number: 3.31 4.12 5.88
Half angle of view: 51.20° 31.73° 17.66°
Image height: 21.64mm 21.64mm 21.64mm
Total lens length: 168.41mm 154.99mm 168.39mm
BF: 8.36mm 52.48mm 81.91mm
Canon EF 17-70mm f/3.5-5.6 IS USM
Focal length: 17.40mm 35.00mm 68.00mm
F-number: 3.33 4.09 5.88
Half-field angle: 51.19° 31.72° 17.65°
Image height: 21.64mm 21.64mm 21.64mm
Total lens length: 168.42mm 153.33mm 168.42mm
BF: 38.32mm 53.44mm 84.11mm...
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