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Canon Patent Application: Canon RF 24-85mm, 24-70mm
This patent application appears to be for a Canon RF lens mount lens of 24-85mm in focal length with a constant aperture of F4.
One of the very necessary things for the RF mount, is a series of lighter weight and F4 zooms, not only the heavy and large exotic lenses. This would be a welcome addition to the RF lens ecosystem. Interestingly this lens also shows a significant ingress into the RF mount having a backfocus of 13.50mm where the RF mount has a distance of 20mm. There is also two 24-70mm lens designs as well, however one is more unlikely because of the extreme mount ingress, having a back focus of only 7.69mm.
Focal Length 24.72 44.55 82.99
F-Number 4.12 4.12 4.12
Image height 21.64 21.64 21.64
BF 13.50 27.08 51.57
Focal Length 24.71 39.20 67.99
F-Number 4.12 4.12 4.12
Image height 21.64 21.64 21.64
BF 7.69 17.60 35.47
Focal Length 24.71 39.93 67.99
F-Number 4.12 4.12 4.12
Image height 21.64 21.64 21.64
BF 13.50 24.36 42.60
US Patent Application 20180348481
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