The lens in question was a Sigma 15-30mm f/3.5-4.5 EX DG, built to work with a Sigma camera using the SA mount. As it turns out, the SA mount is actually based on the Canon EF mount, using the ...

The lens in question was a Sigma 15-30mm f/3.5-4.5 EX DG, built to work with a Sigma camera using the SA mount. As it turns out, the SA mount is actually based on the Canon EF mount, using the ...

Since Leica and Sigma also use the L-mount, it means that Panasonic camera owners have additional flexibility. The lineup lacks some common options, like a 300mm f/2.8 lens, but those may not be ...