Removing the secondary on a C11
Posted 21 November 2012 - 02:34 PM
Posted 22 November 2012 - 06:46 AM
Posted 22 November 2012 - 10:52 AM
The secondary is held against a pivot by the three screws. All of them should be snug in use. Are they?
If you put springs in there, it will be impossible to collimate.
If you take it apart, you need to preserve the clocking of the secondary to the corrector.
Please explain exactly what it's doing to make you think the secondary is loose.
Posted 22 November 2012 - 01:20 PM
Posted 22 November 2012 - 01:35 PM
The reason I've narrowed it down to the secondary is because there is no main mirror shift that I can see, no movement of the corrector plate (I carefully put shims between the plate and corrector holder)and the Bob's Knobs are snug and not overtightened. I have to collimate the scope everytime I observe because I lose collimation sometimes by simply going from something like Cassiopia to Jupiter. I have no plans on taking the secondary apart (I've taken the corrector off several times for cleaning) unless I'm certain that this is the problem. I know how risky that can be and the last thing I want to do is send it back to Celestron. I honestly don't see what could be causing loss of collimation except a loose secondary. I can live with this problem but it's frustrating. Btw, I'm aware that the primary, corrector and secondary have collimation marks on them for realignment.
Posted 22 November 2012 - 04:36 PM
Bob's Knobs hold collimation just fine, BTW.
Posted 22 November 2012 - 07:00 PM
Posted 22 November 2012 - 08:34 PM
Posted 22 November 2012 - 08:46 PM
Posted 23 November 2012 - 07:00 AM
Posted 23 November 2012 - 10:12 AM
Posted 23 November 2012 - 12:00 PM
Posted 23 November 2012 - 02:45 PM
Slightly OT... did flocking the inside of the OTA make a noticeable difference?
I can use my POWERFUL REMOTE VIEWING SENSE to answer that: "no"...
Posted 23 November 2012 - 04:06 PM
Posted 23 November 2012 - 05:29 PM