All wonderful shots - better than what I normally get when trying to shoot dragon flies.
Lester A Dine makes photo stuff for dental photography. The classic Lester A Dine dental lens is a 1:1 macrolens that is supposed to be made by Kiron (what I've read on the internet). Kiron also sold a macro lens under their own name, as well as making the Vivitar Series One 105mm macro. It's an excellent lens.