Should you already happen to have a collection of Canon lenses, you might also consider this that drops the camera to $2,000 from $2,500.

From the Composer Pro II to the Sweet ... Do you use a Canon EOS R mirrorless camera? From wide-angle to telephoto, these are the best lenses we've tested for the platform. The Micro Four Thirds ...

[Dan K] had just such a lens from Sigma, but wanted to get it working fully with a camera using the Canon EF lens fitting. Hacking ensued. The lens in question was a Sigma 15-30mm f/3.5-4.5 EX DG ...