PHD Basics Part 2
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Part 1: Setup can be found here: https://www.youtube.com/watch?v=PRY2jN3xTBQ&feature=youtu.be
Part 2 covers calibration, the drift alignment and guiding assistant tools, overlays, reading the graph, and adjusting the parameters to compensate.
My tutorial on using the drift tool can be found here: https://www.youtube.com/watch?v=ArU5vC1o1Jk