PHD2 is an open source guiding program for beginners or advanced users. This program can be used in conjunction with many atrophotography programs, such as Sequence Generator Pro. This tutorial will help you get PHD2 setup and running with the default settings. Tweaking PHD2 is easily done and the settings vary from each equipment setup
To start you can download PHD2 Free from: PHD2
When you install PHD2 you should have a window similar to this:
After you select the ascom drivers click connect all.
The Next step will be to click on the brain icon. Here you will enter your camera and scope information:
In the camera setting you will need to enter your guide camera's pixel size. This is camera specific.
The next tab is the Guiding tab. There you will need to enter your guide camera focal length as well as calculate your steps. To calculate your steps click the calculate button and a window will open. In that window enter your pixel size, guide scope focal length and the number of calibration steps you desire and click OK
Once you complete that you can exit the advance setup window and select the looping icon next to the connection button