Cleaning C8 SCT Secondary Mirror- Lesser Evil Way?
Posted 18 March 2012 - 01:15 PM
I have read about the care that must be taken in cleaning mirrors but I am left trying to determine which is the lesser of the two choices that I see:
1. Remove the collector plate to access the secondary for cleaning. However, this requires putting it back with careful alignment (which I believe I can do). However, I am worried that there might be delicate shims that I might not be able to replace.
2. Clean from the eyepiece end of the telescope up the tube with long q-tips or something similar. While this doesn't require dismantling the scope, I worry about the ability to clean efficiently and without scratching the secondary. Also, I will be hard to remove the water from inside the scope if any should pool at all.
What are your thoughts? Any and all opinions welcome.
Posted 19 March 2012 - 08:28 AM
I am curious as to whether that inner ring should have came off the collector plate more easily. It really seemed that it would take a lot of force to remove it, and I was worried about breaking the collecter plate.
Posted 19 March 2012 - 08:49 AM
I had to clean my c90 secondary as well as my vintage c5. I didn't have a way to clean either, by removing the corrector, so I did just as you are thinking. I took straws and taped them together. I then taped a large cotton ball on the end being careful to keep the tape on the back side of the cotton ball. I made two, one for saturation with windex and another dry one for wiping afterwards.
It worked well. I had big black chunks all over the c90 sec. spot and they were gone afterward. Same with the C5. I was very careful in my rubbing. The c8 will take a long straw, but I bet you can do it. Its the easiest way if you are reticent to remove the corrector. Good luck.
Posted 19 March 2012 - 12:02 PM
Posted 19 March 2012 - 12:16 PM