mount(e.g. EQ8) which supports Auto-Home function
http://langwoodsphotography.com/eshop/Skywatcher-EQ8-Mount.html Auto-Home Function
The EQ8 mount is equipped with two home position sensors. Working with the SynScan hand controller, the mount can be placed to the same home position after turning on the power. For detailed information, refer to the SynScan hand control’s instruction manual.
az/eq5 好像也因為auto home , 所以不使用極望 .