It becomes extremely useful when carrying lenses around or simply for storing purposes. Lens Cap E-52 II is compatible with the EF-M 18-55mm f/3.5-5.6 IS STM lens. Compatibility -- EF 35mm f/2 -- EF 40mm f/2.8 STM -- EF 50mm f/1.8 II -- EF 50mm f/2.5 Compact Macro -- EF-M 18-55mm f/3.5-5.6 IS STM -- EF-S 60mm f/2.8 Macro USM -- EOS M Black EF-M 18-55mm IS STM Kit