NiSi PRO 40.5-43mm 鋁合金升階環

The threading is perfectly machined—screws on smoothly without any wobble, and now I can share filters across two different lens sizes without buying duplicates. A small piece that makes a big difference in the kit.

I was worried this ring might add too much bulk to my setup, but it's slim enough to stay flush with the lens hood. The aluminum build feels solid when screwing on filters, and threading is smooth every time.

Finally, a step-up ring that fits my 40.5mm lens perfectly without any wobble. The aluminum construction feels solid, and I can now use my 43mm filters on this lens without needing a whole new set.