Alongside its new upcoming ND and CPL flagship filters, the UV filter is another great addition to the new Nano-X PRO Series from K&F. This is a fantastic addition to any camera setup as it reduces haziness and blue-ish cast. Some UV filters get backlash for actually causing other strange artifacts in images such as distortion or discoloration, but this filter does not negatively affect the image quality at all.

Overall, I really recommend you get something like this for your camera. No, it won't reduce the image quality, and it'll actually be a lifesaver as it enhances the image quality and it also offers a level of protection for your lens! Replacing a UV filter is much easier than replacing the glass of your lens if damaged, so keep that in mind.

This is the flagship series from K&F, so if you want the absolute best filter they produce, this is it. It has a brass ring, which is slightly harder than aluminum. That makes it more resilient to binding on the threads, and makes the filter itself feel much nicer in the hand. It has inner and outer threading, so I can stack filters, or clip my lens cap directly to it. That's great for me as I don't have to ever take this filter off. The main point of this filter for me is protection, and it's so much nicer having a high end piece of glass to put on my high end lens rather than most UV filters that are a piece of plastic. I tried to make it produce flares, and I couldn't get any. This is the closest thing to a perfect UV filter that I've ever used. I also really like the design of the case. It has a pull string on the side that'll push the filter out so I don't have to worry about getting fingerprints on it. Overall a very high end filter. Highly recommended.

With modern cameras, the use of a UV filter is actually no longer necessary. I therefore use the UV filter more to protect the front lens against scratches and dirt. I did not observe the often-reported reduced image performance (when using filters), so protecting the expensive lens is more important to me. I did not notice any color differences thanks to the multi-coating. However, I also did not notice any improvement in contrast or sharpness, but this is more due to the good coating of my lens and the use on a modern DSLM. This will probably be different on an "old" analog camera. Unfortunately, I was unable to test this because I do not have a lens with a suitable filter diameter. Thanks to its slim brass mount, the filter can also be used on wider wide-angle lenses. I use the filter with a 24-70mm lens on full-frame. Due to its design, the minimum focal length should be around 17mm on full-frame. The mount is cleanly manufactured and fits well into the thread on the lens. The filter comes well packaged in a sturdy leather case. Once the filter and case are removed, the outer packaging can also be used as a picture frame. Included is a stand and a cleaning cloth for the filter. Everything feels very high-quality and expensive.

I've heard varying opinions on the benefits of keeping a UV filter on the end of a camera lens. Many people say it's smart because if you drop the camera, replacing a filter is much cheaper than repairing an expensive lens. I've heard others (particularly professionals) say it doesn't make sense to buy an expensive lens and then put a cheap piece of glass in front of it that will just degrade the image. Those folks say keeping the hood on the lens will provide plenty of protection and if you have an expensive lens, it should be insured against damage anyway.

I've invested in some good Canon L-series lenses so I'm torn on the best approach. I've been leaning towards going without the UV filter, but I still want one if I'm somewhere like the beach and sand or dirt is blowing. So if I'm going to put another piece of glass on the lens, I want to make sure it's high quality and this filter meets that requirement. You can tell when a vendor has put a lot of thought and care into a product and it shows throughout the process. This filter comes in very nice packaging and they provide a high quality case that has a magnetic latch and a nifty ribbon on the side that you pull to extract the filter from the case. This keeps you from having to reach in and possibly get fingerprints on the filter. Great design!

As to the quality of the filter itself, I don't see any aberrations in the image when I use it. This line of filters from K&F aren't cheap so they won't be for everyone, but if you are taking your photography seriously, you should consider this product.

K&F’s build quality has been second to none in the last several years. They’ve created a series of extremely high-quality filters using very slim precision machined brass rings ( brass is a much better material to use for this purpose than aluminum. It’s much less likely to strip threads or to cross thread) and excellent optical glass.

This filter is no exception. It has absolutely no optical distortion whatsoever. It filters UV and pretty much nothing else I think it has about a 99.9% visible light transmission.

Most people use UV filters to protect their lenses but it’s also helpful to filter out UV light for photographic reasons. It can help to increase the life of your camera sensor and prevent distortion in the images.

The anti-reflection coding on this is extraordinary. This competes well with my expensive high end German filters that cost up to four times as much money.

This filter is slim enough that it should not interfere with the image or create any vignetting even with wide-angle lenses.

This is my review for the UV filter but honestly every K&F filter I have purchased has been extraordinary.

Look at the photo and see if you can tell any difference.

Recently, I have been using K&F backpacks and camera accessories more and more.
I have used several lens filters and they all work perfectly. The coating is beautiful and dust is easy to remove.

The filter comes very well packaged in a box that can be converted into a picture frame. The actual storage takes place in a very high-quality leather case with an "ejection strap" so that you don't have to stick your fingers into the filter disc when taking it out.

The filter and its mechanics are very elegantly made, so the filter thread can be easily screwed in without any scraping noises and frequent attempts to attach it, despite the compact dimensions ("Slim"), and can be loosened again with moderate force after tightening, provided the internal thread of the optics is not damaged and is of the same high quality. The grooved areas are really helpful here, as you don't slide along the filter!

The "glass" of the Nano-X Pro series should be beyond reproach and be among the highest quality in terms of quality and workmanship. Of course, as a "normal snapper" this cannot be tested in detail without a laboratory, but the fact that it can be unscrewed without anything noticeably changing is a solid basis. The UV filter is of course only important for purist color film photographers, but it is not a problem for digital photography with this level of light transmission. Here, cleverly, the "protective filter" has also been included in the official product name. Otherwise, the filter is easy to clean with suitable accessories and does not seem to be a dust magnet.

I personally use the filter with a Z7 on the Z85 1.8 as a protective filter - I do not notice any loss; everything is still "pin sharp" and the bokeh is neutral, even in stronger (back)light conditions. However, true qualities only become apparent after various rougher sessions and filter cleanings...

Conclusion: If you want to play it safe with filters and really want to screw something high quality onto your optics, you have certainly found a potential candidate here.

This is the flagship series from K&F, so if you want the absolute best filter they produce, this is it.

It has a brass ring, which is slightly harder than aluminum. That makes it more resilient to binding on the threads, and makes the filter itself feel much nicer in the hand.

It has inner and outer threading, so I can stack filters, or clip my lens cap directly to it. That's great for me as I don't have to ever take this filter off. The main point of this filter for me is protection, and it's so much nicer having a high end piece of glass to put on my high end lens rather than most UV filters that are a piece of plastic.

I tried to make it produce flares, and I couldn't get any. This is the closest thing to a perfect UV filter that I've ever used.

I also really like the design of the case. It has a pull string on the side that'll push the filter out so I don't have to worry about getting fingerprints on it.

Overall a very high end filter.

Highly recommended.

received the K&M UV filter for free to test as part of the Vine program. I was delighted to receive it, as I no longer have a suitable UV filter for my always-on lens. Even the packaging is very high-quality, and the included bag is very well-designed and easy to handle. You can even make a pretty frame out of the packaging. A microfiber cloth for cleaning is also included. With digital cameras, UV filters are essentially no longer necessary, as the sensor itself is already protected from UV radiation, and the optics don't have to perform as much as with analogue technology. Lens hoods are sufficient to protect the lens. Furthermore, they don't add another layer of glass to the lens, which generally results in a loss of quality. However, the lens isn't protected from dust particles or grains of sand. Since I often lie on the floor when taking portraits, and it's often quite dusty, I still like to use it in these situations. I haven't noticed any negative effects on my images so far. A truly high-quality filter at a reasonable price.

Simple and clean is the way. I've learned that some cheaper alternatives add distortion or even discoloration to your photos and I don't want something that keeps me in the touch ups longer than I need to be. K&F has really done something simple and beautiful here. No distortion. No discoloration. And I can let this live on my lens to keep it safe and offer an extra line of defense in the unfortunate event that something happens. Quality of the build is nothing short of what you'd expect from K&F. Everything fits into place, screws on nicely, and the glass feels like it's secured into the metal housing. Definitely recommend even with the other massive amounts of competition out there.
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