Canon RF Patents: 24-70mm f/4L, 16-35mm f/4L, 12-24mm f/4L Lenses

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Canon has filed three new RF lens patents for the 24-70mm f/4L, 16-35mm f/4L and 12-24mm f/4L IS USM Lenses for Canon EOS R system. Take a look at the patent details below:

[Publication number] JP 2020-140060 (P2020-140060A)
[Publication date] 2020.9.3
Title: Zoom lens and image pickup apparatus having the same

Canon RF 24-70mm f/4L IS USM Lens

Embodiment 1
Zoom ratio: 2.75
Focal length: 24.73 40.97 67.90 mm
F number: 4.12 4.12 4.12
Half angle of view: 41.19 27.84 17.67
mage height: 21.64 21.64 21.64 mm
Lens length: 145.62 138.11 159.46 mm
Back focus:18.00 23.52 49.52 mm

[Publication number] JP2020-140142(P2020-140142A)
[Publication date] 2020.9.3
Title: Imaging optical system and imaging apparatus having the same

Canon RF 16-35mm f/4L IS USM Lens

Embodiment 1:
Zoom ratio: 2.06
Focal length: 16.49 23.84 33.97 mm
F number: 4.12 4.12 4.12
Half angle of view: 52.68 42.22 32.49
Image height: 21.64 21.64 21.64 mm
Lens length: 138.64 133.28 136.75 mm
Back focus: 38.49 48.58 62.18 mm

Canon RF 12-24mm f/4L IS USM Lens

Embodiment 5:
Zoom ratio: 2.06
Focal length: 12.33 16.86 23.40 mm
F number: 4.12 4.12 4.12
Half angle of view: 60.32 52.08 42.76
Image height: 21.64 21.64 21.64 mm
Lens length: 155.71 148.83 150.16 mm
Back focus: 38.45 47.41 60.45 mm

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