New Patent: Canon RF 15-35mm f/4L IS USM Lens

Canon has filed a new lens patent for the RF 15-35mm f/4L IS USM Lens for Canon EOS R system. Take a look at the patent details below:

[Publication number] JP 2020-190636(P2020-190636A)
[Publication date] November 26, 2020
[Patent application title] Optical system and imaging device

Embodiment 1

Zoom ration: 2.20
Focal length: 15.45 24.00 33.95 mm
F number: 4.12 4.12 4.12
Half amgle of view: 54.47 42.03 32.51
Image height: 21.64 21.64 21.64 mm
Lens length: 142.07 135.07 138.26 mm
Back focus: 14.80 23.82 35.39 mm

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Via: Hi-lows-note