Summer is almost here and the dragonflies and damselflies are starting to appear. Here are some shots of a Common Whitetail Skimmer, showing the chalky bluish white abdomen and the transparent wings with black bands. The sun was shining through the wings highlighting the wings and the hairs on its back. It kept taking off to get an insect for a meal and returning to the same warm rock to finish the meal.
When using an extension tube with a long telephoto lens for closer focusing, try putting the extension tube between the lens and the teleconverter. This will allow to focus closer than if you put the extension tube between the teleconverter and the body of the camera. Also if you want to go to extremes, try this combination for closer focusing and it actually enlarges the image a little more. First the telephoto lens, then a 25mm or longer extension tube, then the teleconverter (1.4X) then another 20-25mm extension tube. It works quite well, but you loose auto exposure, so judge your exposure by looking at your histogram. I also usually use a better beamer on a flash foe some fill light with that setup. Remember to try experimenting with different options and see what works best for you and your lens combination.