A patent showing a couple of higher-end Canon EOS R kit lenses has made its way to the public eye. One of the optical formulas in this parent is for an RF 24-105 f/4L IS, which we obviously already have.
The second embodiment is for an RF 24-80mm f/4L IS. This is a smaller lens and makes some sense as a second and less expensive L kit lenses for RF mount cameras.
Japan Patent Application 2019-012243
Canon RF 24-80mm f/4L IS
Focal length 24.72 48.09 82.45
F number 4.12 4.12 4.12
Half angle of view 41.19 24.22 14.70
Image height 21.64 21.64 21.64
Lens overall length 119.50 134.52 149.55
BF 13.50 18.71 22.73
Canon RF 24-105mm f/4L IS
Focal distance 24.72 63.46 131.00
F number 4.12 4.12 4.12
half field angle (degree) — 41.19 18.83 9.38
Image height 21.64 21.64 21.64
length of the lens 137.50 168.92 200.33
BF 13.50 24.03 28.27
Continue reading...