reviewed: “K&F Concept Nano-X PRO Series UV Filter 77mm, Slim Flagship MCUV Filter Protective Filter” The filter came well packaged in elegant outer packaging. Even its exclusive appearance aroused curiosity about the filter. After opening it, an elegant, very cleanly crafted leather filter protective cover is revealed. This has a folding mechanism that closes securely and cleanly with a magnet. On the side of this protective cover there is a fabric flag. If you pull on this, the filter comes partially out of the cover via the pull-out function, so that it can be removed very easily and without risk of damage. The filter is packaged again in a foil bag upon delivery. Inside the packaging there is also a microfiber cleaning cloth. After completely unpacking the filter, you can attest to its equally high-quality and clean workmanship. The filter is free of manufacturing or material defects. The thread of the filter screws onto the lens very easily. The manufacturer states 0.01 mm processing accuracy. You can feel this during assembly. Absolutely nothing wobbles here. This means that neither wide-angle nor telephoto lenses are impaired in their original performance. Everything works perfectly. The result is impressive. From now on, my high-quality telephoto lens will be very well protected and, thanks to this UV filter, which guarantees 99.9% light transmission, it will be optimally equipped for fantastic shots without any loss of image quality. The filter has a double-sided 36-layer nano-coating. The 0.15% reflectivity of the filter ensures the aforementioned good light transmission. This greatly reduces stray light and prevents further glare. The filter is also waterproof, dirt-resistant, and scratch-resistant. The filter is also extremely lightweight with a very thin brass frame. This frame shows the type, manufacturer, function, and serial number of the filter. Conclusion: A high-end filter from K&F that impresses with extremely good workmanship and high quality. A clear purchase recommendation despite the very high price. I rate the product 5 stars. Thank you for reading my review, I hope it was helpful to someone.

The K&F UV filter comes in a beautifully made box, which is then sealed in plastic for protection.
As a little gimmick, the part with the insert and an enclosed cardboard part can be used as a small picture frame if you want.
The lens itself is stored in an anti-scratch bag in the storage bag. This is an eye-catcher in itself, with real leather and really very well made.
There is also a sealed microfiber cloth for cleaning and removing dust before installation.
The filter could be screwed onto the lens without any problems, no jamming and no wobbling, simply well made.

There is some debate as to whether you need a UV filter on a DSLR camera. Let's put it this way: I have not noticed any negative effects on the images so far.

Glass quality is so good !!! You can’t even tell it’s there! Has been on my expensive lens and has protected it 100%

It comes in a package that could be called the best lens protection filter.
At the same time, the price is about five times that of regular products.
You won't notice a big difference when you install it, but it is very carefully made.
I installed it on a Daisangen 24-70 f2.8 lens, and it matches perfectly and has a very luxurious feel, so I am very satisfied.
The price of this protection filter is very high, so it is a little difficult to get your hands on, but it is a reliable product.

Up until now, I have only used cheap filters on my lenses and only to protect the glass of the lenses. Recently, however, I have started to leave these filters out because a UV filter is not necessary with the current lenses and cheap filters in particular can cause lens reflections or ghosting.

The K&F Concept Nano-X-PRO UV filter (slim flagship MCUV filter) with 72mm is lavishly and high-quality packaged. The filter also comes with a beautiful felt bag with leather appliqué. Mounting it on my 17-50 mm Sigma lens is simple and very easy, but you always have to be a little careful not to damage the thread. The cheap filters are usually made of aluminum, the K&F filter is made of high-quality brass. When you simply compare it with a cheap model, you can see a huge and decisive difference; everything is literally reflected in the cheap filter. Every light source is reflected in it. This shows the quality and the high-quality coated and anti-reflective glass.

run this on everything. The super high quality allows me to run it and not even notice it's on. It's a fantastic lens guard.

Excelente lente y le quedó a mi lente sigma 150-600

This is a fantastic filter. I was hesitant to buy this for my Kowa TSN-88 spotting scope because I wasn't sure if it would fit, if it was good quality, or if I really needed it. I was testing my scope on a hot, cloudy day and couldn't quite make out the street sign two miles away on the hill. I put this filter on and things got a little clearer, the mirage a little less, and I could actually read the sign (Lane Ends Merge Left). Very happy with this and I didn't have to pay double or triple for the Howa, B&W, or Kowa filters. The only downside is that the scope's sunshade won't extend with this filter in place, but I imagine that would be the same with any other filter as well.

am new to photography so my experience is limited. The photography store I go to told me to be careful with lens covers as they have had a few people come in with issues with their camera not working and tracing the issue back to a bargain brand lens cover that was bought online. I showed them this one and they said it should be good to go. We have now bought two different sizes for different lenses in this brand. Acquiring the first one in December and the second in February. Both work well and help with stage lighting glare.

Extremely well-made. Very low profile with excellent machine work on the body and threads. And the glass and coatings are top notch. I’ve switched over from Hoya HD3 to these on all my new L lenses.