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 ...
Sigma's DC DN Contemporary f/1.4 primes are available in 16mm, 23mm, 30mm and 56mm versions They're designed for crop-sensor cameras like the Canon EOS R10 There are also two f/2.8 zoom lenses in ...