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fully recommend spending $30 + $5, get a digital temp sensor with dual sensors from dork smith and for the $5, some thermal paste and stick the sensor at the end of the wire 1/2 up the side of the primary mirror.
that way, you will kno for sure when your primary is within a degree of ambient.
next trick is to see if you can split antares into its blue brother. needs great collimation, good seeing and ambient mirror. it is a good test!
well done again on this one!
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