![]() (Brain => Global tab for focal length, Camera tab for pixel size) Make sure your PHD2 settings have the correct values for your guide scope focal length and your guide camera pixel size. Ĭalibrate on any convenient guide star, preferably at a low declination. You can still drift align without an ASCOM connection, see Note about ASCOM. These instructions assume you have an ASCOM connection to your mount so PHD2 knows where your scope is pointing. You should be using the most up-to-date version of PHD2 from Make sure you can see your computer screen when you are standing at the mount. Otherwise, make sure the mount's polar axis is pointing towards the pole, and the altitude setting corresponds to your local latitude. Try to get your mount's polar axis roughly aligned by using your mount's polar alignment scope if it has one. Make sure your scope is balanced and ready for guiding. Make sure your mount is reasonably level. The process takes a little bit of practice, but after doing it a few times, you should be able to obtain an accurate polar alignment in minutes. The drift align tool in PHD2 can be used to quickly obtain a precise polar alignment of your equatorial mount.
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