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Thin brass ring, matte black, knurled edges, 40.5 to 46mm threads

Nisi

Nisi Brass Pro 40.5-46mm Step-Up Ring camera filter

SKU CH-18SK-2RFNH

Lets you use 46mm filters on 40.5mm threads with a brass frame that resists jamming and has anti-reflective lining

  • Use 46mm filters on a 40.5mm lens thread
  • Durable brass alloy frame resists wear over time
  • Prevents jamming and binding during filter changes
  • Knurled sides give a secure grip when handling
  • Anti-reflective interior treatment cuts internal reflections

Filter thread adapter

The NiSi Brass Pro step-up ring lets photographers mount 46mm filters onto lenses that have a 40.5mm front thread, expanding the range of creative accessories available for smaller-diameter optics. It is built for users who want a single high-quality filter set to serve multiple lenses without buying duplicate sizes.

Brass construction under repeated use

The brass alloy frame resists the binding and jamming that can affect aluminium rings when they are screwed on and off frequently, so the threads stay smooth through extended field sessions. Knurled sides give a secure grip for quick changes even with cold or gloved hands, reducing the chance of cross-threading during fast swaps.

Practical limits of the step-up approach

The ring only bridges the 40.5mm to 46mm gap, so lenses with larger or smaller threads will need a different adapter and filters larger than 46mm cannot be used with this specific ring. The anti-reflective felt on the interior helps cut internal reflections, but vignetting may still appear on ultra-wide lenses when the combined filter stack becomes too deep.

Highlights

  • Use 46mm filters on a 40.5mm lens thread
  • Durable brass alloy frame resists wear over time
  • Prevents jamming and binding during filter changes
  • Knurled sides give a secure grip when handling
  • Anti-reflective interior treatment cuts internal reflections

Specifications

No published specifications for this item yet.

Questions about this item

Does the brass frame of the Nisi Brass Pro 40.5-46mm Step-Up Ring prevent jamming when I leave it on my lens all day?

The brass construction is designed to resist binding and jamming, a common issue with standard aluminium rings, allowing smoother mounting and removal even after extended use.

What thread size must my lens already have for this 40.5-46mm ring to work?

Your lens needs a 40.5mm standard filter thread; the ring then provides a 46mm front thread for attaching larger filters.

Will the anti-reflective interior treatment on this step-up ring stop flare when I stack it with my older 46mm filters?

The anti-reflective felt on the inside of the brass frame minimises internal reflections, reducing flare when used with 46mm filters.

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