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 ...
But when [Loudifier] needed an extension tube to do extreme close-ups with a wide-angle lens on a Canon EF-M camera ... which has a shorter mount and allows bringing it in closer than would ...
The advent of the mirrorless Canon EOS ... launched in Leica M mount, also became available for Nikon Z system cameras. In other news, the long-awaited Irix Cine 65mm T1.5 lens became available ...