SIMMOD Cine FRONT RING Dia 49mm to 77mm

360 Degree Knurled Edge 80mm Outer Diameter (O.D.) 77mm Front Inside Thread / Compatible with any 77mm diameter filter Made of solid billet aluminum and anodized black The SIGNATURE SERIES Pro SimRing screws onto the front filter thread of your lens and acts as a step up ring to provide a 77mm front internal thread for screw on accessories, while maintaining a consistent 80mm outer diameter for matte box compatibility. Simply put, our 80mm Rings are designed for precision and optimum fit, smoothness, and compatibility with any matte box system on the market. Converting your front outer diameter to 80mm is a quick and inexpensive upgrade that adds purpose and convenience to any lens set up. Various sizes are available to match your lens's front filter diameter. See below.