| Type of Product | Adapters for filters |
| Filter adapters | Step-down |
| Diametrs IN, mm | 77 |
| Diametrs OUT, mm | 58 |
The B+W 58-77mm Step-Up Ring permits the use of 77mm threaded filters on lenses with 58mm 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.
| Step-Up Size (Lens to Filter) | 58 mm to 77 mm |
| Ring Thickness | 5 mm |
| Ring Material | Aluminum |
| Knurling | Top, Side |