Blue Dasher Portrait

I was trying different lens, extension tube placement and teleconverters along with fill flash to get better effects for photographing the dragonflies. When I get what I feel is the best combination, I will post it here. I have been trying to maximize the sharpness and still get a smoother background. All these photos are from 5 to 10 feet away from the subjects. I cannot use a normal macro lens since they are in an area that I cannot get close to the dragonflies.