The NiSi 43mm True Color Pro Nano CPL Circular Polarizing Filter (Brass Frame) is a professional circular polarising filter built around NiSi’s True Color polarising material and a precision-milled brass frame finished in matte black. It eliminates non-metallic reflections, deepens skies, and lifts saturation in foliage and water, all while preserving the natural colour balance of your scene, so images need less correction in post and stay true to what your eye saw on location.
Many circular polarisers introduce a warm or yellow cast that shifts skin tones and skies. The True Color Pro Nano CPL uses NiSi’s True Color polarising material to deliver neutral, accurate colour rendition, making it ideal for landscape, travel, portrait, and product photographers who rely on faithful colour straight out of camera.
Rotate the filter to tame glare from water, foliage, glass, painted surfaces, and wet rocks. Skies deepen, clouds gain contrast, and through-the-surface detail returns to lakes, rivers, and shop windows, all without sacrificing sharpness or introducing colour shift.
The ultra-thin brass frame is precision-milled and finished in a clean matte black. Brass threads more smoothly than aluminium and is far less prone to binding on lens threads, even after years of use in the field, making installation and removal effortless.
Knurled sides give your fingers something to bite into when the filter is cold, wet, or being used with gloves. Mounting and removing the CPL becomes quick and predictable, even in awkward shooting positions.
A small, knurled adjustment knob threads into the rotating ring to give you fast, fingertip control over polarisation angle. When you prefer a streamlined profile, or need to stack additional filters, the knob unscrews and stows away in seconds.
Both surfaces of the optical glass are treated with NiSi’s Pro Nano multi-layer anti-reflection coating. The coating suppresses flare and ghosting, repels water and oil, and resists fingerprints and dust, so the filter stays cleaner for longer and wipes down easily.
Built with high-quality optical glass to preserve fine detail, the True Color Pro Nano CPL is engineered to keep up with today’s highest-resolution full-frame and medium-format sensors without introducing softness or chromatic aberration.
Offered in thread sizes from 40.5mm through 105mm, the True Color Pro Nano CPL (Brass Frame) fits virtually every modern still and cine lens, from compact primes to large-diameter telephoto and wide-angle zooms.
