B+W 49-55mm Step-Up Ring

The B+W 49-55mm Step-Up Ring permits the use of 55mm threaded filters on lenses with 49mm filter threads. It features a lightweight, aluminum-alloy construction that has a corrosion-resistant, black anodized finish for durability. This step-up ring has side knurling to provide a more textured grip when mounting or removing it from a lens.