The big dovetail clamp provides the connection to telescope support plates and is useful for creating support instruments like side-by-side plates (to support two telescopes in parallel on the same mount) or to allow the precise positioning of the guide rings (to adjust precisely the weight balance). Optional adapter plates are also available allowing the Big Losmandy Dovetail Clamp to replace existing Sky-Watcher’s HEQ5, AZ-EQ5 or EQ6 dovetail saddles.