The Mount Adapter EF-EOS M gives you complete access to the full spectrum of Canon EF and EF-S lenses so you can use your existing lenses and try out new ones to get the shots you want. Expand your EOS M system and explore your creativity The Mount Adapter EF-EOS M gives you complete access to the full spectrum of Canon EF and EF-S lenses so you can use your existing lenses and try out new ones to get the shots you want. The extensive range includes fixed focus and zoom lenses covering a focal length range from 8mm to 800mm - so you can capture anything from stunning broad landscapes to beautiful extreme telephoto shots of distant wildlife. You can also experiment with specialist lenses such as Macro, which lets you shoot superb close ups of the hidden detail of daily life, or Fish Eye to create unique photographic effects.