Enter the world of Electronically Assisted Astronomy - otherwise known as EAA! See my initial setup of the Seestar S50, followed by a quick picture of the Sun. #astrophotography #astronomy #zwo #celestron #coronado #solar #asiair
It's not glass. It's a plastic-like substance that's pretty taught. Like a sheet. Probably mylar, though I don't know enough about mylar to say it is or isn't.