Excellent packaging with a great storage case that works for varied sized filters! I put it on my 16-35, zoomed in and out looking for vignetting in the corners and was pleasantly surprised that it didn't have any shadows at the corners! I checked for color casting, looks great! Polarizes well! Is not too loose or too tight, I can still turn it inside the lens hood without it creeping! Screwed on very well! I have not found any negatives to date with this filter! I would say that it is an excellent buy!

Great filter , good price and a great product

Excellent quality to price ratio as with the other k&f concept products I have used. IQ is perfect, light transmission is high (some cheap CP filters can block a ridiculous amount of light) and no noticeable colour cast. High build quality, excellent case and eco friendly, very much recommended.

Adds a nice effect to the images.

Compre varios de los filtros de K&F, y si bien, la marca en materia de trípodes decepciona, compensa en demasía en materia de filtros. Este kit es excelente, a nivel de calidad óptica, y de materiales.
No tienen casi color cast o aberraciones cromáticas, asi como no pierde nitidez la imagen.
Realmente recomendable, sobre todo porque el ND1000 puede competir cabeza a cabeza con un Lee Big Stoper, y dar mejores resultados por una fracción del precio.

El único contra que tiene como todo KIT es que no trae un estuche para guardar todo (el estuche de K&F se vende aparte y es bastante chico para mis necesidades).

As someone that does a lot of automotive photography, having a polarizer helps a lot to get rid of some of the reflections of the car. Of course, there are numerous polarizers to choose from but I did not want to spend $100+ for a polarizer if a cheaper one could perform just as well.I used it with my Sigma 50mm 1.4 ART lens and I am very impressed with the capability. The circular polarizer is very well made, very sturdy and great at removing reflections off of cars (what I mainly used it for).Overall, if you are looking for a CPL for automotive photography, the K&F Concept does what it is intended to do. And, the best part is the price! It is very inexpensive compared to the other CPLs, such as B+W.

No complaints here. Good price for good glass. Don’t get any weird distortion or color. Good enough for me.

My first experience with the K&F Concept filters was with the purchase of a light pollution filter I've been happy with, particularly liking the grippy knurl added to the edges of the filter. After accidentally scratching my Hoya NXT Pls CPL 82mm filter which is more than double the cost of the K&F filter, I decided to purchase the K&F Nano Series CPL filter and see how I like it. Moreover, I also chose to go ahead and buy a 95mm version as well, to replace a Pro Optics (Adorama house brand) filter that I thought might be a lesser quality filter. Both K&F filters arrived today and a visual inspection of them reflects a quality product as I expected. However, one minor complaint is that I like the round K&F filter case which as a rigid plastic insert that appears to be grooved to support holding any of various sizes of filters securely in place in the case....that is, perhaps for a range of filter sizes, K&F may be using the same case to save manufacturing costs. However, while the 82mm filter arrived with that same case, the 95mm filter was in a more common, square plastic case with foam cutout to hold the filter. Still fully functional, just not as nice as the case provided for the 82mm filter. I don't expect to see any problems with the cheaper case, but it is the type that frequent use could find the plastic hinge wearing out eventually; I simply favor the 2-piece round case of the smaller filter.

As with every kf filter I’ve purchased, this one is of the highest quality. It’s almost impossibly thin, and well constructed in every way.

This is my first K&F filter and build quality is really good. It has a slim profile and the polarizing feel really smooth.

I've used Hoya filters B+W filters below, which are a bit expensive, but provide extraordinary image quality. This K&F filter offers similar picture quality to the Hoya, which is great, at a cheaper price. It also includes a "usable" filter holder that more expensive options don't include in the package.

All in all, excellent balance between price and quality