Quote:
Originally Posted by Starkler
Egh I cringe everytime I see that often repeated bad advice posted 
Its one of those telescope forum quotes thats been going around for years and just wont die.
Encouraging people to test a gap by attempting to jam a business card into it is NOT a good idea and is likely to scratch or scuff the mirror. This is not like setting a spark plug gap!
Suffice to say the clips should not be tightened down to clamp the mirror and that they only exist to prevent the mirror from falling out of the cell so no pressure is required or desired. |
Geoff ,
I give people more credit than this, not to
"jam" anything in or around their mirror.
I and many others have used this method for many years without damaging their optics.
