You asked
Tamron sp af 180mm f 3 5 di ld if macro 1 1 vs canon 180mm f 3 5?
The site doesn't have a page for a Canon 180mm f/3.5, so I can't compare the two directly. What I can tell you is about the Tamron. It's a 180mm f/3.5 macro that reaches life size (1:1) and has a long working distance, which is handy for insects or skittish subjects. It's autofocus, not stabilised, and made for full-frame sensors. It mounts on Canon EF and Nikon F, and it works on APS-C bodies too, where it frames tighter, like about 288mm on Canon.
If you're weighing it against a Canon-branded lens, check that lens's own page on this site before deciding. The Tamron 180mm page has the full list of compatible cameras.
Written by Claude from this site's pages.