Canon Patent For A Bunch Of RF Mount Prime Lenses (24mm, 35mm, 28mm, 50mm)

February 17, 2021
Canon Patents
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Image from the patent literature

It’s not a secret that Canon is actively working on expanding the lens lineup for the EOS R full frame mirrorless system. A new Canon patent application adds to the long list.

Canon patent application 2021-18277A (Japan) discusses optical formulas for a bunch of prime lenses for the RF mount with f/1.8 and f/1.4.

RF 24mm f/1.4:

Focal length: 24.00 mm
F number: 1.40
Half angle of view: 42.03
Image height: 21.64 mm
Lens length: 120.00 mm
Back focus: 15.00 mm

RF 35mm f/1.8:

Focal length: 35.00 mm
F number: 1.80
Half angle of view: 31.72
Image height: 21.64 mm
Lens length: 100.00 mm
Back focus: 15.00 mm

RF 28mm f/1.8:

Focal length: 28.00 mm
F number: 1.80
Half angle of view: 37.69
Image height: 21.64 mm
Lens length: 100.00 mm
Back focus: 15.85 mm

RF 24mm f/1.8:

Focal length: 24.00 mm
F number: 1.80
Half angle of view: 42.03
Image height: 21.64 mm
Lens length: 110.00 mm
Back focus: 15.06 mm

RF 24mm f/1.4:

Focal length: 24.00 mm
F number: 1.40
Half angle of view: 42.03
Image height: 21.64 mm
Lens length: 120.00 mm
Back focus: 15.79 mm

RF 50mm f/1.4:

Focal length: 50.00 mm
F number: 1.40
Half angle of view: 23.40
Image height: 21.64 mm
Lens length: 100.00 mm
Back focus: 15.00 mm

More Canon patent applications for RF mount lenses are listed here. All Canon patents are listed here. Some particularly interesting patent applications we think might get into production are these: