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Awesome little device
Setting up and configuring the PoleMaster was very easy. Lined it up and selected the stars withing the application. Saved me about 90 minutes of drift aligning the mount. Wish I had this years ago.
PoleMaster - a high precision, easy to use electric polar scope. Achieving a high precision polar alignment is not an easy feat. You may spend tens of minutes, if not hours, to have a good polar alignment. After you get everything ready and begin taking exposure, you bumped the mount and you have to restart from the beginning. An iOptron's Center-balanced Equatorial Mount (CEM), such as CEM25 and CEM60, which equipped with an all time accessible polar scope, will allow you to make a quick and precise polar alignment in a few minutes. However, you still need to bend yourself or knee down on the ground to perform the polar alignment.
The most straight forward way for polar alignment is just to find the true north point and match its position with the rotation center of your R.A. axis. The PoleMaster electronic polar scope employs this idea. This device can be installed on front of the R.A. axis. It use a highly sensitivity camera to capture the image of northern sky. The sensitivity is much higher than the naked eye, so it can see not only the Polaris but also those faint stars nearby. Based on the locations of these stars, it can calculate the position of the true position of North Pole. With some sophisticated methods the PoleMaster can also detect the rotation center of the R.A. axis. It will mark the two points on the computer screen, one is the R.A. rotation center, the other is the virtual polar point. Adjust the mount and let them overlap then the pole is well aligned.
PoleMaster electronic polar scope provides a quick and easy solution. It gives you a direct and simple way to align with the pole. Within two minutes you could obtain a very high polar alignment precision up to 30 arcsec.