Canon Patents

Patent: RF cinema zoom lenses

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Canon News has uncovered a patent that appears to show RF mount cinema zoom lenses. It looks like these are cinema lenses because of their complexity and larger image height of 14mm. APS-C lenses from Canon tend to have an image height of 13.66mm.

Japan Patent Application 2020-194056

Canon RF Cinema 18-55 F2.0
Focal Length 18.51mm 34.71mm 55.00mm
F Number 2.06 2.06 2.06
Half Angle of View 37.10° 21.97° 14.28°
Image Height 14.00mm 14.00mm 14.00mm
Total Lens Length 250.01mm 250.01mm 250.01mm
Backfocus 12.95mm 12.95mm 12.95mm
Canon RF Cinema 16-70mm F2.8
Focal Length 16.51mm 36.08mm 68.00mm
F Number 2.80 2.80 2.80
Half Angle of View 40.30° 21.21° 11.63°
Image Height 14.00mm 14.00mm 14.00mm
Backfocus 24.40mm 24.40mm 24.40mm
Canon RF Cinema 19-50mm F2.0
Focal Length 19.01mm 33.19mm 50.00mm
F Number 2.05 2.06 2.06
Half Angle of View 36.38° 22.87° 15.64°
Image Height 14.00mm 14.00mm 14.00mm
Total Lens Length 225.07mm 225.07mm 225.07mm
Backfocus 13.38mm 13.38mm 13.38mm
Canon RF Cinema 18-55mm F2.0
Focal Length 18.51mm 34.86mm 55.00mm
F Number 2.06 2.06 2.06
Half Angle of View 37.10° 21.88° 14.28°
Image Height 14.00mm 14.00mm 14.00mm
Total Lens Length 235.03mm 235.03mm 235.03mm
Backfocus 12.94mm 12.94mm 12.94mm