You asked
Is the canon ef 180mm f 3 5l macro usm worth it?
The Canon EF 180mm f/3.5L Macro USM is worth a look if you want a macro lens with some reach. On full frame it frames at 180mm, which keeps you back from small subjects like insects, so you don't have to crowd them. It has autofocus but no stabilisation, so use a fast shutter speed or a tripod.
It also works on Canon APS-C bodies, where it frames like about 288mm. Its depth of field there is closer to f/5.6, which is handy for macro.
The trade-off is size and price. As Sensor sizes explains, full-frame lenses are bigger and more expensive, and macro shots already give you little depth of field. If you mostly shoot close-up work on a full-frame body, this lens is a solid choice. For the full list of compatible bodies, see the lens page.
Written by Claude from this site's pages.