37mm Adapter Rings

Product Name:39mm Adapter Rings
The 39mm Adapter Rings feature a sturdy design that fits on to either the lens or filter holder. The holder itself effortlessly clips in to the ring making the full system ready for use in seconds. The quick release, spring-loaded attachment mechanism makes using this system a breeze.
Adapter rings technology is a local area . It uses a special three-byte frame called a token that travels around the adapter ring.  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.