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Japan Patent Application 2018173487 shows a bunch of different optical formulas for new EF-M zoom lenses.
Lenses included in the patent:
- EF-M 15-130mm f/3.5-6.3 IS STM
- EF-M 18-130mm f/3.5-5.6 IS STM
- EF-M 18-200mm f/3.5-6.3 IS STM
According to Canon News, the major focus of this patent application is making lighter focus groups, which would improve AF performance and prevent “wobble”, which would be important for video work.
