On you camera :-)
I went hunting for a macro and ended up using cameracorp.com.au and rented first before buying. Glad i did too.
The first ($31p/m) was a Sigma 70mm and it was stunning. NO CA, beautiful colour, and as sharp as you could ever want it. BUT... the 1:1 working distance from the front element was just 3~4cm, and that is just too close for a lot of subjects.
I now have from them a mint condition S/H Canon 100mm Macro ($21p/m that will end up costing me $400) and it's a much better solution.
Really glad i didn't buy the Sigma outright.
These were taken with the Sigma:
The jelly Fungi (White) are 3mm across, and the Discinella (Orange) about 4..
Haven't had the chance to get fungi with the Canon yet and can't wait for Autumn to get into the forest again. But this Waratah Anemone gives me hope.
Trev