hi
I have a 10inch F4 Orion optics standard grade primary mirror and wanted to know if there are any options in DIY testing to get a general idea of the quality of the mirror? or are there any testers in AU that can do the testing?
I came across these
http://www.astrofox.nl/contents/en-u...g-mirrors.html
https://www.instructables.com/id/Opt...bolic-Mirrors/
https://www.teleskop-express.de/shop...th-a-star.html
Thanks
Alistair