Quote:
Originally Posted by E_ri_k
But basically I am wondering if overtightening can cause funny shaped stars.
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Absolutely YES!!!! If you have them too tight you'll be distorting the shape of the mirror and your stars will look, er, rubbishy. As you've found out.
If you're not moving the scope around much (i.e. in a car) I would just let them off altogether. Far better to learn how to collimate so you can tweak the alignment of the mirror when needed rather than bending the mirror out of shape out of fear of having to touch it. Otherwise, if you really must apply them, they should juuuust be touching the back of the mirror. No pressure at all!