K&F CONCEPT 77mm True Color Polarising CPL (Nano-X Series) circular polariser filter

What it is and why people buy it

A circular polarising (CPL) filter is one of those camera accessories that feels a bit niche until you use it for the kind of scenes where reflections and flat light ruin the shot. The K&F CONCEPT 77mm True Color Polarising Filter is built to do two things at once: cut unwanted glare from non-metal surfaces (like water or glass) and improve colour contrast, particularly when you’re dealing with blue sky and bright cloud.

What makes this one stand out on paper is the “True Color” positioning. It uses a titanium coating technology that’s described as helping video capture avoid the yellowish look some users complain about, with the goal of keeping colours closer to what the screen shows. If you shoot travel, landscapes, or general outdoor video where lighting changes quickly, that’s the sort of promise you’ll care about.

It’s also a multi-coated design: 28-layer coatings on both sides, plus features aimed at day-to-day handling like being oil- and scratch-resistant and having anti-fog / reduced reflections.

Key takeaways

If you regularly photograph skies, water, windows, or anything reflective, a CPL can be a noticeable upgrade rather than just another filter in the bag. This K&F CONCEPT model is designed to rotate smoothly thanks to its CNC frame pattern, which is meant to increase friction for easier install and removal.

That said, it’s not a magical “make any scene look better” filter. Polarising filters are most useful when there’s a visible polarisation effect to work with, so in very flat light or certain low-contrast situations you might not see the same impact.

Where it shines in real use

On a bright day, try this: set up for a river or lake shot, then rotate the filter while looking through the viewfinder (or checking live view). As you turn it, the glare on the water should reduce, letting you see deeper tones and making the scene feel less washed out.

For skies, it’s similar. With the filter at the right angle, you often get better separation between a vivid blue and white clouds, with improved contrast and saturation. In video terms, the “True Color” claim is aimed at maintaining more natural colour during recording rather than letting the footage drift towards a warmer/yellowish cast.

What you get (and what to be cautious about)

The filter is described as using Japanese optical glass, with a claim that it can eliminate 99.9% of polarised light and offers a 45% high transmittance. Whether you feel those exact numbers in practice varies with your camera, exposure settings, and scene—but the intended design is clear: reduce polarisation effects and glare while keeping light loss under control.

It’s also important to note the packaging detail: the old and new versions of the box are sent at random, but the interior contents are stated not to vary. That’s worth bearing in mind if you’re picky about unboxing or matching older filter sets.

Tech specs

• Name: K&F CONCEPT 77mm True Color Polarising CPL Filter (Circular Polarizer)
• Type: Circular polarising filter (CPL)
• Format: Circular filter
• Size: 77mm
• Type: True Color CPL filter
• Coating layers: 28 layers multi-coated (both sides)
• Optical glass: Japanese optical glass
• Polarised light reduction: 99.9% (claimed)
• Transmittance: 45% (stated)
• Frame: CNC mirror frame with trapezoidal pattern for grip during rotation
• Durability features (as described): waterproof, oil-resistant, scratch-resistant, anti-fog, reflection reduction

Should you buy it?

It’s a solid pick if you shoot outdoors and want a circular polariser that targets glare control and stronger sky/water contrast, including for video where colour cast matters to you. You’ll likely appreciate it most when reflections on water or glass are a recurring problem.

It may not be the best choice if you rarely shoot scenes with reflections (or you mostly work indoors where CPL effects won’t show much). Also, if you’re comparing against simpler or lower-coated filters, keep in mind this is positioned around coatings and colour handling rather than being the absolute cheapest route to “a polariser in 77mm”.

For anyone using a 77mm front thread, the decision usually comes down to whether you’ll actually use the rotation and whether your typical subjects benefit: skies, water, windows, and bright daylight scenes.

Mini FAQ

Will this filter reduce reflections on water and glass?

Yes—circular polarising filters are described as removing unwanted reflections from non-metal surfaces such as water and glass.

Is it better for video than a basic polariser?

The “True Color” approach is aimed at video recording, specifically to help avoid yellowish imagery by restoring more real colours on screen (as described).

Does the coating help with haze and reflections?

It’s marketed as anti-fog with reduced reflection, and multi-coated on both sides for those kinds of optical improvements.

Does the package version matter?

The packaging may be the old or new version at random, but the interior content is stated not to vary.

Final verdict

If your photos (and some of your video) regularly involve skies, water, or glass reflections, the K&F CONCEPT 77mm True Color CPL makes practical sense: it’s designed to polarise effectively while keeping colour handling and coatings in the mix. If you mainly shoot scenes where polarisation doesn’t change much, you may find it’s one of those filters you keep for specific trips rather than constant everyday use.