Hello,
Here are some quite detailed photos of jumping spiders and other small insects taken with the Canon MP-E65. The camera/lens was tripod mounted which has restricted me to shooting at the edge of shrubs and bushes only.
This lens goes from 1:1 to 5:1 and requires good technique. I found that shooting at F11 gave me a softer image with the 7D due to the effects of diffraction so I now shoot at F8 with this lens and the 7D combo.
As the slightest whiff of a breeze makes the subject quickly depart the frame, I resorted to clamping the branch to the tripod which also gave me a better angle of the spiders. If I work slowly and ever so gently, the spider settles down although I sometimes have to gently twist the twig to slowly rotate the spider into view.
For a couple of the shots I managed to grab 3 to 5 frames for focus stacking with Helicon. Using the MP-E65 is much more technically demanding than the 100mm F2.8 and is more akin to long focal length auto guiding when compared to wide field imaging!
Thanks for looking!
Dennis