Tamron does offer lenses that are compatible with Canon and Nikon cameras. That said, thus far, Tamron has not released any lenses for Canon R-mount mirrorless cameras. It does, however, have a wide selection of lenses for Canon EF-mount (DSLR). Similarly, there are plenty of options for Nikon DSLRs (F-mount), but only two—at the time of writing—for Nikon mirrorless (Z-mount). Pay close attention when ordering to make sure that the make and model that you’ve selected is the correct mount style for your specific camera body.