I was surprised how you can get an 82 mm polarizing filter for very little €€€. I then compared it with my 77 mm filter ("branded product", although K&F is also a well-known name). The K&F filter absorbs much less light (I don't know why) and has a slight brown tint (see picture, below is the K&F filter).

The filter was provided to me free of charge via Vine to test. I was already using the 72mm version from another offer, but the two seem to be technically identical. This 58mm filter fits on my smaller Canon RF 28-50. The filter itself does its job and provides a clearer view of reflective surfaces. It rotates without much play but with slight resistance. You can get an LCD TV almost black with it, the effect is strong. I couldn't detect any vignetting with the above lens, the filter is very narrow and therefore the thread is very short. This means that the original Canon cap no longer grips, but K&F supplies one that fits better. There is also a loop included to hang the cap on the lens. The dangling would just annoy me. The price of the K&F filters is reasonable and I am very happy with them for my (amateur) use. Unfortunately, the manufacturer only supplies a filter box that is far too big and doesn't close properly. If you want to "always have it on", that wouldn't matter, but I usually take the filter off. This doesn't affect the function at first, but I don't want to have to clean the filter if necessary. The 72 came with a suitable box. The filter performance and price are good, the missing box is annoying. 4 stars.

I recently bought the 67mm polarizing filter for my Sony A6000 in combination with the SEL16-55G lens and am very happy with my choice overall! ✔️ Improved image quality: The polarizing filter reduces unwanted reflections and enhances colors, which delivers impressive results, especially for landscape shots. ✔️ Robust workmanship: The filter feels solid and high-quality, which suggests a long service life. ✔️ Easy to use: Screwing the filter onto the lens is easy and works smoothly. ❌ Difficult to unscrew: Unfortunately, the filter is difficult to unscrew from the lens, which can be a bit frustrating when changing lenses quickly. Overall, the 67mm polarizing filter largely met my expectations.

The polarizing filter is nicely supplied with a cap and cord for the cap. At first glance, it seems quite usable. The low price is probably due to the simpler design compared to more expensive filters. Compared to my more expensive filters, it is relatively stiff. I wouldn't use it on an expensive lens, but I find it usable on the relatively inexpensive Tamron 28-200 for Sony E Mount (definitely better than no filter at all).

The polarizing filter is generally well made, the thread fits well, the rotation is a little stiffer than with my B&W polarizing filters, but it's OK. As for vignetting, I would say that it's within reason, although the nano coating isn't on the level of my B&W filters, but you can still tell that there's something extra on it. There's a slight color cast towards magenta, but it's not really dramatic, my B&W filter is a little more neutral. The filter is OK for the price, but I'll personally stick with my B&W filters for now.

The polarizing filter from K&F Concept is delivered in a plastic box together with a cleaning cloth, a lens cap and a strap for attaching the lens cap. Quite a lot of accessories! It's just a shame that the filter slides back and forth in the box without any additional protection. A few cents for a suitable lining would have been worth it. The filter can be easily screwed onto the lens and - so far - removed just as easily. The rotating ring for adjusting the polarizing filter, on the other hand, is very stiff, which I personally don't like so much. Nevertheless, the workmanship does not give a cheap impression at all. According to the manufacturer, the glass has a nano coating, but in my opinion this can only be sparse. When used, this filter changes the colors more than the filter I normally use in a higher price range. All in all, this filter is a very interesting offer, especially for occasional users. At currently just under € 22 for the 67mm version, the K&F Concept polarizing filter is very cheap and offers quite decent quality. I could do without the lens cap and strap, but of course the accessories are not a disadvantage. I give the polarizing filter four stars.

The CPL filter from the K&F "Concept K-Series Pro" makes a reasonable impression. The filter, 82mm in my case, can be easily screwed in without any extra effort, thanks to the milled trapezoidal structure. The term "nano" is misleading in my opinion; I can't imagine that you can get a real nano coating for the relatively low price. Nano-coated filters are easier to clean, but streaks quickly form when cleaning. But that's just a guess. The filter is multi-coated, according to the description 18 layers, but that can't be verified either. But it is coated without question, which reduces the tendency to reflection and reduces ghosting in the final image. The filter disks rotate slightly against each other with the typical polarizing filter effect. AF works perfectly for me with the filter screwed on; I couldn't detect any exposure deviations, nor any color shifts or drops in contrast. Everything works perfectly. The same applies to the sharpness; I couldn't detect any significant influence of the filter. The filter is relatively light, which shows that little material is used. The lenses fit well into the frame without wobbling. The slim design means there is no vignetting and no drop in brightness in the image. It is therefore also recommended for strong wide angles. The complete scope of delivery is exemplary, including cap (snap-in), cord, cleaning cloth and plastic case. The snap-in is a bit loose on me and can be easily removed without pressing the lock, so it can easily be lost (so use the cord!). All in all (for cheap optics) it is worth buying. You can't go wrong with it. A higher quality filter should be used on a 2,000 euro optic.

Here you get a really usable CPL filter for a relatively low price. I already have a CPL from the Nano X series from K&F Concept, the magnetic version of which is about twice as expensive. At least as far as the optical properties are concerned, I couldn't see any differences. I had problems with reflections in bright lights with a very cheap CPL from another brand. There was no sign of this with the K&F filter from the Nano K series. The workmanship of the filter is convincing, the thread runs smoothly, the rotating ring offers enough resistance so that it cannot twist on its own. The supplied accessories such as the lens cap with lanyard and microfiber cloth also impressed me in terms of workmanship. It is a bit annoying that the plastic box is unfortunately too big for the filter and does not contain any padding. A Nano X filter is supplied with appropriate padding. So the filter naturally rattles wildly back and forth in the box. Overall, however, a convincing CPL for a beginner-friendly price. Of course, you can only make better statements about the properties and durability of the coating after longer use. The occasional user should be well advised with this article. My rating: 5 stars - perfect product Transparency: I was given this article free of charge for a product test. However, this does not influence my rating. It is just as honest and critical as with the items I paid for. I have not carried out a professional product test here, but am rating the product as a normal consumer.

K&F products are now standard items that almost every photographer carries with them. Fair prices and now often first-class quality convince me again and again. This polarizing filter is perfect for my new lens with a 67mm filter thread and is actually always on it. The build quality is first-class and in addition to the actual filter, there is also a cap, a dust cloth and a ribbon included. Caps are always great, I don't use the ribbon. Conclusion: I am very happy with the filter. It does exactly what it is supposed to do, effectively remove reflections and even provide better contrast. The overall quality is excellent and the included accessories are useful.

already have a lot of filters from K&F and this one fits in perfectly with my collection. The packaging is also nice, I like silver, but the included hand strap is a bit strange. I just couldn't get it to fit onto the lens cap. The fact that a lens cap is included also sets this filter apart from others. And there's not much to say about the quality of the filter if you know K&F. The material and workmanship are great, and the image quality is also flawless. The different price levels at K&F go hand in hand with better coating/coating. The K series is of course inferior to the X series, for example, but it is also a bit cheaper. And for most people the K series will be sufficient, as they are already 18-fold coated, so they also repel water and dirt well, are easy to clean and provide outstanding image quality. It only becomes problematic with very wide-angle lenses, so I think with a focal length of less than 30 mm, where you can see the usual polarization X, but I have not yet come across a CPL filter where this is not the case. The resistance to turning could be a little lower for my taste, adjusting the filter is quite stiff. But that is a matter of taste.