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Patent: Canon shows off optical formulas for APS-C RF mount kit lenses | Canon Rumors


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Canon News has uncovered a patent with various APS-C RF mount lenses. On the Canon Rumors RF mount lens roadmap, I have had an RF 18-45mm f/4-5.6 IS STM for quite some time. I’ve always thought this was a strange focal length for full-frame image sensors based on Canon’s history of kit lens focal lengths.

I have no heard anything about an APS-C image sensor equipped sensor for the RF mount in quite some time, but I still believe such a camera is part of Canon’s long-term plans.

Canon RF-S 15-45mm F4-6.3

  • Focal distance: 15.46mm 24.00mm 43.65mm
  • F-number: 4.16 4.92 6.50
  • Half angle of view: 38.73° 29.65° 17.38°
  • Image Height: 12.40mm 13.66mm 13.66mm
  • Total length of lens: 96.84mm 85.69mm 84.27mm
  • BF: 26.19mm 34.03mm 49.18mm

Canon RF-S 18-45mm F4.5-6.3

  • Focal length: 18.53mm 30.00mm 43.65mm
  • F-numbe:r 4.56 5.48 6.50
  • Half angle of view: 33.78° 24.48° 17.38°
  • Image height: 12.40mm 13.66mm 13.66mm
  • Lens total length: 89.11mm 81.23mm 81.40mm
  • BF: 28.48mm 38.21mm 47.77mm

Canon RF-S 16-45mm F4-6.3

  • Focal length: 16.41mm 24.00mm 43.65mm
  • F-number: 4.21 4.90 6.50
  • Half angle of view: 37.08° 29.65° 17.38°
  • Image height: 12.40mm 13.66mm 13.66mm
  • Lens total length: 99.00mm 87.77mm 83.61mm
  • BF: 24.60mm 31.13mm 45.64mm

Canon RF-S 20-45mm F4-6.3

  • Focal length: 20.01mm 27.0mm0 43.65mm
  • F-number: 4.60 5.15 6.50
  • Half angle of view: 31.79° 26.84° 17.38°
  • Image height: 12.4mm0 13.66mm 13.66mm
  • Lens total length: 92.00mm 84.32mm 83.15mm
  • BF: 33.77mm 39.3mm 52.69mm





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