Since the launch of its mirrorless EOS R system, Canon has played its lens tech notoriously close to its chest, but the times ...
Sigma has announced that four of its APS-C F1.4 prime ... These lenses are already available for L-Mount, Sony E-mount, Fujifilm X-Mount, Nikon Z Mount (excluding the 23mm), Canon EF-M Mount ...
[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 ...