Thierry Legault, an amateur astrophotographer based in France and author of the famous book "Astrophotographie", decided in 2009 to modify the motor of his EM400 in order to track satellites (ISS, space shuttle etc.). He wanted to capture such bodies passing in the night sky.
He has been using the FireWire astronomy camera DMK 31AF03.AS for tracking and the software application "Videos Sky" by Emmanuel Rietsch to capture the images since October 2010.
Below is a photo of his rig:
If you would like to know more about Thierry's and Emmanuel's research, you can read the full report and watch some videos by clicking on the following link (in French):
Poursuite de satellites - Adaptation d'une monture Takahashi EM400
Or you can take a look at the following report in english: