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A Sony lens with the NiSi True Color Pro Nano CPL (Brass Frame) fitted, its adjustment knob raised

True Color CPL, Brass Frame

Cut the glare.
Keep true color.

A circular polarizer with NiSi True Color film in a precision-milled brass frame. No warm cast, a removable knob, and fifteen sizes from 40.5mm to 105mm.

  • 15 sizes
  • Brass frame
  • Pro Nano both sides
Shop the CPL

Get to know it

Choose your size

One filter, fifteen threads.

Every size is the same filter. Match it to the filter thread on your lens.

NiSi True Color Pro Nano CPL (Brass Frame) with its adjustment knob fittedBrass frame

True Color Pro Nano CPL

A circular polarizer that cuts reflections without warming the scene.

  • True Color polarizing film
  • Precision-milled brass frame
  • Removable adjustment knob
  • Pro Nano coating, both sides
40.5mmShop size 43mmShop size 46mmShop size 49mmShop size 52mmShop size 55mmShop size 58mmShop size 62mmShop size 67mmShop size 72mmShop size 77mmShop size 82mmShop size 86mmShop size 95mmShop size 105mmShop size

Not sure of your thread? It is printed on the front of the lens or inside the lens cap, next to the diameter symbol.

Why brass and True Color

Neutral color, smooth threads.

True Color polarizing film for the picture, a brass frame for the lens.

01 / 08

True Color, no warm cast

Many polarizers push skies and skin tones warm or yellow. NiSi True Color polarizing film keeps the scene neutral, so the color you shoot is the color you saw.

A Sony camera on a tripod with the brass frame True Color CPL fitted, against evening bokeh

02 / 08

Turn it to cut the glare

Rotate the filter to pull non-metallic reflections off water, glass, foliage and wet rocks. Skies deepen and clouds gain contrast.

A hand turning the CPL by its knob on a Sony lens

03 / 08

Precision-milled brass

An ultra-thin brass frame finished in matte black. Brass threads more smoothly than aluminum and is far less prone to binding on your lens.

Two brass filter rings in front of a Sony camera with the CPL fitted

04 / 08

Knurled for grip

Deep knurling on the frame edges gives cold, wet or gloved fingers something to hold when you mount and remove the filter.

Looking down on the knurled frame of the CPL fitted to a Sony lens on a wooden table

05 / 08

A knob that comes off

Thread the knurled knob in for fingertip control of the polarization angle. Unscrew it for a low profile, or when you stack filters.

The removable adjustment knob lying beside the CPL frame

06 / 08

Pro Nano on both sides

Double-sided anti-reflection coating suppresses flare and ghosting, repels water and oil, and wipes clean easily.

Water and oil beading on the coated glass of the brass frame CPL

07 / 08

Glass for high resolution

High-quality optical glass keeps fine detail on today's highest-resolution full-frame and medium-format sensors.

Side view of a Sony lens with the brass frame CPL fitted, against warm bokeh

08 / 08

40.5mm to 105mm

Fifteen thread sizes, from compact primes to large wide-angle and telephoto zooms.

A Sony camera with the brass frame CPL fitted, resting on a wooden bench

With and without

See what the polarizer does.

The same scene with no filter, then with the True Color CPL (Brass Frame) fitted.

Reflections off water

The glare lifts off the pool and the rocks under the surface come through.

Waterfall pool photographed without a polarizer
Waterfall poolNo filter
The same waterfall pool with the NiSi True Color CPL (Brass Frame) fitted
Waterfall poolTrue Color CPL

Deeper sky, clearer water

The sky deepens and you can see into the shallows, with the color left neutral.

Coastal inlet photographed without a polarizer
Coastal inletNo filter
The same coastal inlet with the NiSi True Color CPL (Brass Frame) fitted
Coastal inletTrue Color CPL

Wet rocks

Less shine on the wet boulders and the water between them.

Boulder beach photographed without a polarizer
Boulder beachNo filter
The same boulder beach with the NiSi True Color CPL (Brass Frame) fitted
Boulder beachTrue Color CPL

Clouds and haze

Clouds gain contrast against a bluer sky, and the haze over the fields drops.

Farmland photographed without a polarizer
FarmlandNo filter
The same farmland with the NiSi True Color CPL (Brass Frame) fitted
FarmlandTrue Color CPL

Specifications

The details.

Filter typeTrue Color circular polarizer
Polarizing materialNiSi True Color
GlassHigh-resolution optical glass
CoatingPro Nano double-sided anti-reflection, water and oil repellent
FramePrecision-milled brass, matte black, knurled edges
AdjustmentRemovable knurled knob
Thread sizes40.5, 43, 46, 49, 52, 55, 58, 62, 67, 72, 77, 82, 86, 95 and 105mm

Questions

Before you buy.

Which size do I need?

The size of your lens filter thread. Look for the diameter symbol on the front of the lens or inside the lens cap, followed by a number in millimeters. The brass frame CPL comes in 40.5, 43, 46, 49, 52, 55, 58, 62, 67, 72, 77, 82, 86, 95 and 105mm.

What does True Color mean on a polarizer?

Many circular polarizers add a warm or yellow cast that shifts skies and skin tones. NiSi True Color polarizing material is made to keep color neutral and accurate, so images need less correction afterwards.

What will a CPL remove?

Reflections and glare from non-metallic surfaces: water, glass, foliage, painted surfaces and wet rocks. Rotate the filter to set how much. It also deepens skies, gives clouds more contrast and reduces atmospheric haze.

Why a brass frame?

Brass threads more smoothly than aluminum and is far less prone to binding on lens threads, even after years of use. The frame is ultra-thin, precision-milled and finished in matte black, with knurled edges for grip.

What is the knob for?

The small knurled knob threads into the rotating ring for fast fingertip control of the polarization angle. When you want a streamlined profile, or need to stack other filters, it unscrews and stows away.

How do I keep it clean?

Both sides of the glass carry NiSi Pro Nano anti-reflection coating, which repels water and oil and resists fingerprints and dust, so the filter wipes down easily.

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