SCT Telescope Focus Variation vs Temperature

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Another astrophotography video on focusing! We spend some time looking at the Celestron C9.25 SCT telescope focus variation as the outside temperature drops during the night. Focus points are made periodically over a four-night period using a Bahtinov mask and the Celestron Focus Motor. Unfortunately, at present, neither Astrophotography Tool (v3.84) nor NINA will allow for temperature-based focus compensation for focusers, like the Celestron Focus Motor, that do not have a dedicated temperature sensor. Oh well.

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