Have bought a used C5 (circa 2000) I noticed that it had a small amount of what looks like RTV or harder sealant on the corrector's retaining ring. It has the silver phillips head screws. From what I've found on the web those C5 that had the issue had black phillips head screws and no drop of sealant on the corrector's retaining ring (added by Celestron to help cure the issue?).
Was there ever any formal announcement of this issue and if so what were the year(s) of scopes that had the issue. Mine seems to be centered very well but have not had it out yet.
I would think getting the corrector off with that hard sealant in place might be a real chore but since mine has clean mirror and inside corrector I guess that's an issue for a later day.
Anyone know the real story on this?
Edited by Jeff Lee, 12 January 2020 - 01:57 PM.