Promaster Step Up Ring - 43mm-55mm

This step-up ring fits snugly and doesn't wobble at all, which was my main worry. It’s machined precisely and makes swapping filters quick and easy.

Finally no more fiddling with mismatched filter sizes—this ring threads on smoothly with no wobble. I've been swapping it between two lenses and the threads still feel precision-tight after a dozen uses.

The machining is precise enough that my filters sit perfectly flush now. I had been worried about light leaks with stacked rings, but this one creates a solid, gap-free connection.