Canon recently has filed new lens patent on several fast telephoto prime lenses. Includes already announced RF 85mm f/1.2L USM(B&H Photo Video/Adorama/Amazon), Canon also filed patent for RF 135mm f/1.8L USM and RF 100mm f/1.4L USM.
Canon RF 135mm f/1.8L USM embodiment:
- Focal length: 133.0mm
- F number: 1.80
- Half angle of view: 9.2°
- Image height: 21.6mm
- Overall length of lens: 150mm
- Backfocus: 18mm
The RF 135mm f/1.8L USM lens is expected to be released in 2020, and RF 100mm f/1.4L USM lens is expected to be released in 2021 to 2022.