My Macro Rubinar 8/500 was pretty good (but not ideal) after main mirror relax (as per Dr. Strickling,
https://www.strickling.net/russentonne.htm).
When trying to go a bit further and dicmantle the front group, I noticed what looks like de-lamination of the secondary mirror.. it is quite visible when looking at the angle.
Anyone had similar and tried to fix it?
Thanks in advance for any info and/or suggestion!
Cheers,
Bojan