NiSi Brass Pro Step Up Ring 40.5-46mm

Description

Overview

The NiSi Brass Pro 40.5-46mm Step Up Ring is a precision-machined adapter designed to let you use 46mm threaded filters on lenses with a 40.5mm filter thread. Part of the NiSi Brass Pro Step Up Ring series, this compact accessory is built for photographers who want a reliable, low-friction solution for expanding their filter compatibility without purchasing multiple filter sizes.

Whether you shoot landscapes, travel photography, or long exposures, a quality step up ring is one of the most practical tools in your kit. The NiSi Brass Pro version goes beyond a standard aluminium step up ring by addressing the two most common frustrations: binding on removal and reflections inside the frame.

Experience & Benefits

The most immediate advantage of the NiSi Brass Pro design is how easily it releases from your lens after use. Standard aluminium step up rings are prone to binding and jamming, particularly after extended shooting sessions or when temperature changes cause minor expansion. The brass frame construction resists this tendency, making the ring significantly easier to remove without tools or excessive force.

Handling is improved through the knurled outer edge, which provides a firm, comfortable grip even when working quickly or in cold conditions. This is a small detail that makes a genuine difference during field use, especially when switching filters between shots or working under time pressure.

For long exposure photography, the anti-reflective interior of the frame is a meaningful feature. It minimises internal reflections that can degrade image quality during extended exposures, helping to maintain contrast and clarity in your final images. This makes the ring a particularly well-suited companion for landscape and seascape photographers relying on ND filters for slow shutter work. The matte black finish on the exterior further reduces the risk of stray light bouncing into the optical path.

Practical Details

The 40.5-46mm size pairing is specifically useful for photographers whose lenses carry the less common 40.5mm filter thread — found on a range of compact prime lenses and kit zooms across Sony, Panasonic, Olympus, and other mirrorless systems. Rather than purchasing a dedicated set of 40.5mm filters, this step up ring allows you to use your existing 46mm filter collection, making it an efficient and cost-effective addition to your gear.

Installation is straightforward. The ring threads onto your lens in place of a filter, and your 46mm filter then attaches to the outer thread of the ring. The brass construction ensures smooth threading in both directions, and the knurled grip makes it easy to seat and remove by hand without relying on a filter wrench.

The NiSi Brass Pro Step Up Ring fits naturally into a system-based filter workflow. If you are building a kit around a single filter size for use across multiple lenses, a set of step up rings is the most practical way to maintain compatibility without duplicating your filter investment. The Brass Pro series is available in a range of size pairings, allowing you to expand your system confidently as your lens collection grows.

Summary

• Eliminates binding and jamming common with standard aluminium step up rings, making removal clean and effort-free
• Anti-reflective interior minimises internal reflections during long exposures for cleaner results
• Knurled outer edge provides secure grip for easy hand-tightening and removal in the field
• Matte black finish reduces stray light and keeps the ring unobtrusive in use
• Cost-effective compatibility solution — use your 46mm filters on 40.5mm threaded lenses without buying duplicate filter sets
• Precision brass frame construction for smooth, reliable threading
• Steps up from 40.5mm lens thread to 46mm filter thread
• Part of the NiSi Brass Pro Step Up Ring series, available in multiple size pairings
• Compatible with all standard 46mm threaded filters including ND, CPL, UV, and mist filters
• Best for: landscape and long exposure photographers using compact mirrorless lenses
• Best for: photographers building a unified filter system across multiple lens sizes
• Best for: travel shooters who want a lightweight, practical filter compatibility solution