Promaster 轉接環 - 40.5mm-58mm

Finally found a step-up ring that doesn't cross-thread or wobble when attaching my filter. The precision machining here is noticeably tighter than the cheap ones I've used before.

Finally, a step-up ring that doesn't fight me when I screw it on—the threads catch cleanly every time. Used it to mount an old 58mm filter on my 40.5mm lens and the fit is rock solid, no wobble or cross-threading at all.

Finally, a step-up ring that actually screws on smoothly without any annoying cross-threading. The precision machining is obvious as soon as you thread it on—no wobble at all. It’s made my 58mm filters usable across my collection.