[Brightcolours]

Try it on a FF body through an extension tube - it might work. The working distance might become a problem though.

I already have that for FF (the 35mm f2.8 equivalent FOV wise), the Micro-Nikkor 55mm f3.5. Since it is a 55mm lens, the working distance is bigger. Not IF though, so the extension of the lens reduces the working distance becomes 5-6cm at !:1, which a much larger lens diameter providing shading, and no built in LEDs.

 

I just think being able to do the same with the EOS M might be neat.