Promaster 5103 67-72mm Aufstiegsring

Finally, a step-up ring that doesn't cross-thread or feel flimsy; the brass threads on this one are machined perfectly. It mounted my 72mm filter onto my 67mm lens without any play, and the slim profile means no vignetting even at wide angles. I've had cheap aluminum rings before that bent, but this

Bought this to mount my 77mm CPL on a 67mm lens, and the fit is precise with no wobble. The aluminum build feels solid enough for everyday use, and I appreciate that it doesn't add much bulk to the setup. A simple solution that just works.

Finally, a step-up ring that actually screws on smoothly without any wobble. It held my 72mm polarizer securely on my 67mm lens for a full day of shooting. Definitely solved the problem of having to buy duplicate filters for different lens sizes.