Quote:
Originally Posted by Barrykgerdes
The small amount of distortion that can occur if the mirror clips are tight enough to stop the mirror moving around on its carrier are much easier to live with than a mirror that slips when you move the telescope. If the mirror moves you are never going to get it collimated.
Barry
|
I dont think you read what I said. I did not say tighten the mirror down I said firm enough to keep the mirror in place. Yes any pressure on the mirror will make distotions an appreciable portion of a wave length but you must keep the mirror stable first and if you don't get concentric diffraction rings on a star test you can not say your scope is fully collimated. There is no near enough about it!
and make sure you read Thierry's paper. I have it in MSword format if you can't find it.
Barry