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Origin:CN
Step-Up Adapter Ring 62mm Lens to 77mm Filter Size
The inner ring that screws onto the converter lens,then the outer ring fits into the standard lens.
Adapter rings technology is a local area . It uses a special three-byte frame called a token that travels around the adapter rings. Adapter ring frames travel completely around the loop.Stations on a adapter ring are logically organized in a adapter ring topology with data being transmitted sequentially from one adapter ring station to the next with a control circulating around the adapter ring controlling access.
Step-Up Adapter Ring allows you to use larger size filters on lenses with a smaller diameter thread. The first number is the size that screws into the lens, the second number is the filter size.