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 ...
[Sam] has a Canon EOS ... modifying an FD lens for his new camera. To do the modification for the FD lens, all that’s needed is some epoxy, a screw driver, and an M42 to EF adapter.
Weight 200g / 7.1 oz. Notes Image Stabilization; EF-S lens mount, exclusively for bodies with APS-C sensors. A lens hood (EW-60C) and lens case (LP814) are available as optional accessories.
If you don’t shoot with a Nikon mirrorless camera but still want to invest in some great starter lenses, take a look at our lens guides for Canon EF- and RF-mount and Sony E-mount bodies.
Mirrorless cameras like the Canon ... lens adapter, revealing that it will have autofocus. As far as we know, this will be the only autofocus adapter for the Leica M to Canon RF mount.