[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 ...

Canon’s RF 16-28mm f/2.8 IS STM is a full-frame wide angle zoom with weather sealing, IS and a budget-friendly price ...