With this step-up ring
you can install a 37mm converter, filter or lense on your 30mm camera.
All in metal made, it will resist to anything... almost! ^_^
We can read here or there
The Sensei 30-37mm Step-Up Ring permits the use of 37mm threaded filters on lenses with 30mm filter threads. It features a lightweight, aluminum-alloy construction that has a corrosion-resistant, black anodized finish for durability.
- Step-Up Size (Lens to Filter) : 30mm - 37mm
- Ring Thickness : 3mm
- Ring Material : Aluminum
- Knurling : None