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Canon patents 5 new EF-M lens designs

The arrival of the EOS R and the accompanying new RF mount have left some observers wondering what's going to happen to Canon's other mirrorless system – EOS M – and whether Canon will continue support for its EF-M lens mount.

The good news for users of EOS M cameras is that, according to, it looks like Canon has applied to patent five new optical formulas for EF-M lenses. The less-welcome news for enthusiasts is that they're all variable-aperture zooms, with no sign of a fast prime. 

So what lenses can we expect to see? According to reports they will be:

  • EF-M 16-50mm f/3.5-5.6
  • EF-M 15-45mm f/3.5-6.3
  • EF-M 18-130mm f/3.4-5.6
  • EF-M 18-200mm f/3.5-6.3
  • EF-M 15-130mm f/3.5-6.3

Canon already has a EF-M 15-45mm f/3.5-6.3, which is offered as kit lens with M-series cameras, so it would appear that we can expect a new bundled kit lens to come with future EOS M cameras. Canon also has a EF-M 18-150mm f/3.5-6.3 in its range, so the rumored EF-M 18-130mm f/3.4-5.6 sees another slight overlap.

These lenses are unlikely to excite many photographers, being very much at the entry-level end of the range, and the EF-M lens lineup is still missing some fast telephoto zooms and prime lenses. With the arrival of the RF full-frame mirrorless system, we're not sure we'll ever see those either. 

Phil Hall is an experienced writer and editor having worked on some of the largest photography magazines in the UK, and now edit the photography channel of TechRadar, the UK's biggest tech website and one of the largest in the world. He has also worked on numerous commercial projects, including working with manufacturers like Nikon and Fujifilm on bespoke printed and online camera guides, as well as writing technique blogs and copy for the John Lewis Technology guide.