It becomes extremely useful when carrying lenses around or simply for storing purposes. Lens Cap E-43 is compatible with the EF-M 22mm f/2 STM lens.
-- EF-M 22mm f/2 STM
-- EOS M Black EF-M 18-55mm IS STM Kit
-- EOS M Black EF-M 22mm STM Lens Kit
-- EOS M White EF-M 22mm STM Lens Kit