NEW TAMRON SP AF 90MM F/2.8 Di MACRO 1: 1 CANON MOUNT LENS Description: The latest version of the venerable Tamron 90 mm. Macro, this lens is widely used by naturalists & other pros who need top imaging performance plus a longer lens-to-subject (working) distance to enable easier lighting & access to skittish subjects. enhanced resolution, chromatic correction, & coatings make it a superb choice for full-frame or APS-C format SLRs. * The one-touch switchover function is available on. Nikon & Canon mounts only. The Sony & the. Pentax mounts require switchover in two steps.