NiSi Brass Pro 40.5-49mm 升級轉接環

I was worried a step-up ring would add bulk to my small 40.5mm primes, but this brass piece is so thin and precise you barely notice it's there—the 49mm filters now thread on perfectly with zero wobble or cross-threading. Solid build quality that just feels right when you twist it on.

The brass threading is noticeably smoother than the aluminum rings I've used before, making it easy to screw filters on without cross-threading. It’s solid enough that my 49mm polarizer sits perfectly flush on my 40.5mm lens, and the price is reasonable for the quality.

Swapped out my old step-up ring for this one and the difference is night and day—the brass threads engage smoothly without any cross-threading. It holds my 49mm ND filters securely, and the slim profile means no extra vignetting on my wide lens.