ProMaster Step-Up Ring 49mm-55mm

This ring threaded on smoothly without any cross-threading issues, which is a relief after fighting with cheaper rings. The precision machining is obvious in how snugly it holds my 55mm filter on the 49mm lens.

Finally, a step-up ring that actually screws on smoothly without that annoying wobble. The aluminum is machined precisely so my polarizer sits flush and doesn't get stuck. A solid little piece that's held up to a few months of regular use.

Took a chance on this step-up ring to adapt my vintage 49mm lens to my 55mm filters, and it's been flawless. The threads engage smoothly without any wobble, and the precision machining is obvious the moment you screw it on. Solid little piece of metal that does exactly what it should.