Modern technology makes astrophotography with long exposure times easy. Guiding systems are used to keep the object exactly on the sensor. Either as a autoguider on a guide scope or using an off-axis guider in the primary light path. You can find both systems here.
This astro camera and autoguider offers sensational sensitivity, a modern sensor, and all of this in an ultra-compact housing, not bigger than a 1.25" eyepiece.
With ASIAIR the ASI120MM Mini Camera and the guide scope, you have a complete, powerful autoguiding solution and camera control via your smartphone or tablet