ProMaster Step-Up Ring – 37-49mm

A perfect complement to the ProMaster filter line. ProMaster Stepping Rings are precision machined to properly convert the thread size of your filter and/or lens. The 37-49mm ring adapter easily screws onto the front of any 37mm lens, and converts the thread size of your lens to the thread size of any other 49mm accessory (such as filters, hoods, flashes and lens converters).