I have found a pretty good way to get decent photos of live ant specimens. I just found the smallest crystal clear plastic box I could at the Container Store here in the States. I glued some black felt in the bottom of it so the ants could keep from sliding around when positioning it.
I just put the ant in the box and wait for it to finally calm down and stand still. After this, I can usually move the box around to get pictures at any angle I want.