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ving, I wish I have that too! No guide scope or laptop on site for me. Just set and forget, and hope your calibration is right! You will find out after the first few exposures.
The AstroTrac is just a device mounted on a tripod that you mount a camera to and will track the stars. It does have a finderscope (optional extra for only a few $$) to find the south or north celestial pole that should be set first (I'm still yet to do this part though), and then you go! Well worth checking out their website.
There is another option that's called Vixen Polarie also worth looking into.
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