A patent showing two optical formulas for some Canon RF primes has been uncovered by Canon News.
Canon RF 40mm f/1.8
Focal Length: 41.92mm
F-Number: 1.85
Angle of View: 27.30°
Image Height: 21.64mm
Lens length: 71.50mm
BF: 13.97mm
Canon RF 35mm f/1.8
Focal length: 36.00mm
F-number: 1.85
Angle of view: 31.00mm
Image height: 21.64mm
Lens length: 79.97mm
BF: 11.65mm
I’m expecting non-L RF mount prime lenses to be coming in the relatively near future, and this patent may be part of a series of Non-L prime lenses coming to the EOS R system
The patent does show a DSLR for the illustrations, but the backfocus length of these optical formulas shoes these designs are definitely for the RF mount.
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