55-55mm Coupling Ring

55-55mm Coupling Ring

Coupling rings are used to attach two lenses together via the filter threads on the front of each lens. Coupling rings are similar to stepping rings, only where a stepping ring has one male and one female thread, a coupling ring has two male threads.

Coupling rings are particularly popular with Macro photographers, allowing the stacking of lenses - an inexpensive way of achieving high magnifications.