Quote: Amazing capture. Was it a handheld shot? Autofocus?
Manual focus, handheld, but the absolute key is fieldcraft. I can see "different" as an insect flys by - this individual was not flying the same as the others due to its "load". Feeding damselflies are quite unlikely to take off as you approach.
I like to keep the KP on or around ISO640, where the accelerator kicks in. This can imply setting Av mode on a fixed ISO, or TAv (as here) if the ISO comes out at 640-800.
The short KA tube is a perfect match for the Sigma. It doesn't quite get you 1:1, but it does get you extra working distance - about 75cm here.
A KP and Sigma 180/5.6 make a very compact and lightweight kit for fieldwork.