I thought it was interesting to see the details of where the wings attach to the thorax on this Blue Dasher dragonfly’s body. I was using a 300mm f/4 lens with a 2x teleconverter and an extension tube to get a closer view. I usually carry extension tubes or closeup filters with me in case I come upon an interesting closeup photo opportunity. But I usually use extension tubes more than closeup filters because you are adding another glass element that might degrade the image. You can also experiment with the placement of the extension tube. Placing the extension tube before or after the teleconverter gives you different “focus zones.” Also the width of the extension tube gives you different focus zones. So it is best to see what combination works best for you and the lenses you are using. But it is fun to try different ways to get the image you want. Plus you never know when it will come in handy. Images below are a series of images using extension tubes & teleconverters with 300mm & 400mm lenses.