This image was created by stacking 4 separate photos taken using a Canon 7d Mark II, with the 70 - 200 2.8L IS lens. Using free Registax software. I learned how to do this by watching a tutorial uploaded by Tony Northrup. Links provided below
http://www.astronomie.be/registax/download.html
https://www.youtube.com/watch?v=_cGbbSxMug&list=WL&index=35&t=308s-