Did a little digging around. This guy is on Facebook ( I dont do Facebook so not posting a link) but also shows up in alot of other places. Write him, he might tell you. He is also on Instagram.
https://earthsky.org/?s=jeff+dai
http://twanight.org/newTWAN/photographers_about.asp?photographer=Jeff%20Dai
Thank you. I was making dinner and didn’t look into the original link as of yet.
I actually have that website running in one of my web browsers right now.
I am trying to get into astrophotography beyond the occasional eclipse.