German Equatorial Mount

A mount used primarily with refractors and reflectors. A counterweight
on one side of the polar axis balances the weight of the optical tube on
the other. Not as convenient as a fork mount when sweeping from horizon
to horizon, as the tube can bump the legs or pedestal mount as the
scope passes the zenith, requiring that the tube be "tumbled" or rotated
180° to continue its tracking of objects down to the western horizon.
Its setting circles usually are operated manually. Somewhat more
difficult to use and transport than a fork mount telescope, but stable,
relatively inexpensive, durable, and capable of astrophotography near
the celestial pole.