NiSi 6948 55mm Adapter for 100mm Filter Systems

The NiSi 55mm Adapter for 100mm Filter Systems (model 6948) is a step-up ring that allows photographers using lenses with a 55mm filter thread to take full advantage of NiSi's 100mm square and rectangular filter ecosystem. It threads onto the front of your lens and connects to the 82mm main adapter ring on NiSi filter holders, creating a secure bridge between the smaller lens diameter and the larger holder system. This makes it an essential accessory for landscape, long-exposure, and architectural photographers who rely on NiSi's graduated ND, polarizer, and solid ND filters but shoot with lenses that have a 55mm front element.

Built from corrosion-resistant anodized aluminum alloy, the adapter is engineered for durability in the field without adding unnecessary weight to your setup. Compatibility spans a broad range of NiSi holder systems including the V5, V5 Alpha, V5 Pro, V6, V6 Alpha, V6 Switch, V7, and V7 Alpha, as well as the C4 Cinema filter holder for 4"x 4" cinema filters. As a bonus, the ring also functions as a standard 55mm-to-82mm step-up adapter, which means you can use it to mount any 82mm screw-in circular filter on your 55mm lens — extending its usefulness beyond the NiSi holder system alone.