Quote:
Originally Posted by astronut
did you overtighten the primary clips, if yes, back them off so that you can fit a business card under the clips.
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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.