A Summer 2022 I aquired my Celestron 9.25 edge and some related hardware.
All new equipment.
The first night (august? september?) I put on the celestron 0.7x reducer and took some photos of the moon.
At the end of the session, I was unable to remove the 0.7x reducer from the scope manually.
It was STUCK tight!
I did not torque it down when I screwed it on. Just hand tight.
I managed to get it off but it took some inventive use of plumbing tools and some rubber sheet.
I then applied a thin coat of either a thin liquid silicon lube, or thin coat of a thicker grease. I do not recall.
Testing the removal of the reducer afterwards, it seemed to help.
October 2022, I intalled the reducer again. This time recalling the effort to remove it, I was cautious not to over tighten.
It was firm enough to hold camera without any play.
I did not apply any lube, as I had already applied a very thin coat the last time which I thought would be sufficient.
At the end of the session... yep,... it was stuck.
In fact it seemed to be tighter than the last time. It seemed to take way more swearing than the last time to get it off using the tools/rubber sheet technique I had used in the past.
The teeth of the pipe wrench cut through the rubber several times during my efforts.
I am fortunate not to have scratched or damaged the reducer.
Questions: What sort of lube is safe to use on screw on optics?
I have heard stories of vapor outgassing issues of certain scopes, that cloud the mirror/optics with a haze.
I do not want a thin layer of hydrocarbons or such building up on my glass/mirrors.
How common is this problem? I am aware of one other person who has warned of this.
Before posting this I thought that MAYBE applying some heat (hair dryer or such) to warm up the reducer might have helped.
Does anyone know if this would in fact help? Or make things worse?
Thanks for feedback
Edited by andrewpugh, 03 December 2022 - 12:23 PM.