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mirror safety.

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Hi.. Might be odd question but... If I'm using my scope on a cold night and collimate it outside adjusting the primary mirror. Can I risk cracking the mirror if I don't loosen the locking screws when I bring it back inside and it warms up again?

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I think there would be no risk of cracking the mirror in those circumstances. The actual collimation screws don't bear on the mirror, the mirror retaining clips (3) should be loose enough to be able to turn the mirror with light finger pressure.  :smiley:

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