K&F Concept 77MM Polarising Filter Circular Polarizing CPL, Ultra Slim, Japan Optics, Multi Coated, with Cleaning Cloth (Nano-K Series)

Very cool

Due to the anti-vignette design, it is very thin despite having a freely rotating ring for the filter element.If there’s any sort of recess it is incredibly difficult to get it screwed on tight enough, that rotating the filter won’t also unscrew it.Virtually incompatible with clamp-on matte boxes. Works OK on regular lenses without accessories.

This is one of a few K&F Concept filters that I own and they have never disappointed.This is good value considering the 72 mm size. It's ultra slim as described by the maker and hardly noticeable on the front of a lens.A brand I have no hesitation in recommending.

Edit: I have upgraded from 1 star to 5 stars to reflect on the outstanding customer service I received.I had a problem with the filter I received but the company got in touch with me and offered me a refund, replacement, or an alternative filter (which they despatched almost immediately).The filter they sent me works beautifully.Things go wrong sometimes and I was very impressed with how well and how quickly they responded to this.I would have no hesitation in purchasing from the againFits easily and turns easily, Works ok for wider shots, but on full zoom the image is unusable.I took two shots with a Nikon Z6 and the 28-400mm lens, shot on manual at 400m, F/8, 1/320s, ISO 100The first one is with no filter and the second with the K&F filter.It's cheap so not worth returning but I will need to buy something that works at 400mm

Ordered a cheapish filter to begin with to see if suited me. At first fit it appeared not to vary polarising effect as I rotated it on the camera. But upon further trials on the reflections off my car bonnet, it does vary with rotation as described. Just got to get the angle right. Quality is very good for a budget filter, but one thing I don't like is how hard it can be to remove from lens. Iy takes a few rotations on sliding ring before it seems to pick up on the threads and starts to unscrew. Not a massive issue, but would be a right pain if needing to remove in a hurry.

It's been my 1st CPL so was not 100% what to expect. Looking through the filter or with the filter attached to the lens it's not clear which is the polarised part of the fliter. However attaching and looking through the view finder whilst rotating, particularly when directed at the sky or water, it becomes clear when those parts are being 'polarised'. Definitely reduces the glare of water reflections and adds saturation to blue skies.I have no idea if the more expensive CPLs on the market will provide a better end result as this is the only one I've ever used. But so far it's delivering the results I was after.

I have this polariser in 72mm. On my tamron 18-400mm lens. At wide angles its fine but at higher zoom it completely falls apart. Ruining the image quality. That said the company got in touch with me quickly and sent me a replacement item as an apology. Could be mines a dud but I would be cautious about using this in super zoom lenses.However on more regular lenses you shouldn't have a problem.

Takes your photography to the next level, particularly automotive photography. Would recommend!