Convert your Sky-Watcher Fusion 120i mount or Sky-Watcher Fusion 120i and 150mm Maksutov to an equatorial platform for longer exposure astrophotography.
The Sky-Watcher Fusion 120i is a handy performer when it comes to tracking, but like all AZ (Alt-azimuth) mounts, while it can keep an object centred for imaging, the object will slowly rotate over time. This is called field rotation.
By using a wedge and aligning it to the south celestial pole, AZ mounts are effectively turned into EQ (equatorial) mounts that don't have problems with field rotation and allow for longer exposures.
