This is likely Canon's lens roadmap for 2020
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Here is the rumored Canon EOS RF-S mirrorless APS-C lens roadmap - Photo Rumors
Nikon's 2020/21 Z lens lineup roadmap has been leaked
Canon plans to release 32 RF-mount lenses over the next four years: Digital Photography Review
Canon EF-M Lens Roadmap: Five New EF-M Lenses Coming Next 24 Months - Canon Rumors CO
Canon Upcoming Lenses Roadmap 2018 - 2019 « NEW CAMERA
Canon RF lens roadmap: current and future lenses for the Canon EOS R system
Canon RF-S Lenses in 2023
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Rumored Canon RF lens roadmap - Photo Rumors