K&F Concept52mm MC UV Protection Filter with 28 Multi-Layer Coatings HD/Hydrophobic/Scratch Resistant Ultra-Slim UV Filter for 52mm Camera Lens (Nano-X Series)

Both lenses are Sigma lenses with 2 different brands of UV filters on them. The lens on the left is my 150-500mm with a filter made by another brand. The right is my 150-600mm lens with the K&F filter. The lens on the left looks a little hazy, while the K&F filter does not.Does not decrease image quality that I can tell. You can feel that it is weather sealed, but I'm not testing it to see if it truly is.Comes in a plastic caseSo far, no complaints.

I purchased this for a camera that I seldom use. It still is a valuable collectors item that I want to keep in excellent condition and that means I needed to protect the lens. I only have filters with the Zeiss "T" coating constructed of German Schott glass on the cameras I use frequently, because I consider them the best multicoated filters that I can afford but, I cannot spend that kind of money for a camera I use infrequently.Any camera that is threaded to accept a filter deserves the protection that comes with a mounted filter in front of the actual camera lens. I would rather risk damage to the AR coating on a filter that can be easily replaced than risk damaging the actual lens on any of my cameras from cleaning, and exposure to airborne dust or chemicals.This brand of filter came carefully packed and the filter holder included with the filter is well designed and provides excellent protection for the filter when it is not on the camera lens because I am using a different type of filter. This filter has multiple AR coatings on both sides of the filter and after comparing the results of identical pictures with the same camera using this filter and one of my prized and now unaffordable Zeiss "T" filters I can say that I can see no difference in the results. I am sure an optical lab could document some differences, but in the real world, I can see no differences when comparing the test pictures I captured through this filter and the Zeiss filters I have used.This design works so well, I will slowly replace the older non Zeiss filters I have on my older lenses and cameras with these newer designs.

B&W make a number of different filters, but their nano coating lineup gets pricey. Nano isn't the end game to lens filters, but it does help resist oily moisture and liquids.If B&W Nano coated filters are a 10, then this filter is a solid 7.5 to 8. The build quality isn't bad, but it isn't as solid and rugged as a filter should be. The filter is glass, not plastic. And the nano coating is great. It doesn't take a pixel peeper to see the slight difference to a high end filter vs this (when holding into the light).If you are a hobbyist or just looking to protect your lens, this is a great option. If you are a professional, you probably remove the filter before shooting, but in case you don't, stick with the upper end products out there. K&F are up n comers and I have no doubt their inventory will pose a challenge to the upper end filters at some point.

I first purchased the K&F Nano Series filter for one of my lenses. I believe it was for my Nikon 80-200mm F2.8 D ED lens. That lens produces really sharp images at distance and is not a close focus lens, even noted by Nikon. I bought the lens used and it came with a beat up UV filter. I was getting ghosting and when I removed the filter the ghosting was significantly reduced. I ended up buying several more for my other lenses. I also use B+W filters too. Well made filters as well, but a little more costly. The K&F is by no means a $100 filter, but for the price it does what I need. I especially like the nano-coating that resists grease and water. Worked well when I was photographing at the beach. Easy to clean the sea mist off without smearing. We really do not need UV filters anymore with digital since UV does not interfere with the sensor like it did with film. I simply use them to keep from having to clean the front elements of my lenses all the time. I feel reducing that to a minimum will prevent potentially scratching the element. I know there are a few schools of thought on this topic, but I just do what I am comfortable with. From what I read and can tell the filter is glass and not plastic, which is nice these days. I have them on all my lenses now and happy with them.

Just got a new lens, needed a 77mm filter to protect it. I'm not going to sit and tell you this glass is better than some other glass. I just got it, and I'm not an optics expert.But, I will tell you the packaging was beautiful, the filter case- one of the nicest I've ever seen. It is circular- and holds multiple size filters with grooves in an internal bracket. So much nicer than the big clunky square filter boxes I've got from other brands.But- the killer was the filter being so thin- and that it has 2 areas that are gnarled, for you to grab it- while the rest is smooth- a really nice feature.Seems right at home on my Canon RF24-105/4 L IS USM.Didn't notice any difference in speed of focus- or aberration- but, again- I'm not a lab.I'm pretty happy with this brand. Didn't expect to be.

Did not screw on my Nikon 70-200 lens. It kept cross threading and wouldn't engage and I was afraid it would ruin the lenses threads. Compared to the one I replaced it with it is light and 'plasticky' and had less threads. I contacted support and they wasted several says asking for order numbers, photos, videos and planned to forward my issue to their expert after I clearly gave them the name off the box and order number. I have had cameras and lenses since 1976 and never had a problem and to put my mechanical ability into context I rebuilt engines and transmissions since I was a kid so its not me being all thumbs.

Unexpensive, but I will pay more for better quality next time. I'm an experienced photographer and bought this for my 70-200mm lens. After 2 weeks, the lens of the filter separated from the ring and was loose inside between the filter ring and the front element of my 70-200mm. The worst part is that I couldn't unscrew the filter ring. I struggled to take it off fearing to cause damage to my lens, and finally I had to bend the ring to take it off (see picture) The filter is now destroyed and I'm really disapointed. I've used many many filters in over 15 years and I never experienced anything like this.

K&F has made few versions of UV/1A filters and this one falls in the upper price range.Packaging is superb and the glasss material is very good. I did not see any color degradations so far. Design on the metal rim offers ease of installation/removal unlike others which might require a filter wrench sometime. It might not be the best filter (price wise) but for C$30 it justifies money well spent to protect my glass which is already over half a grand. I trust this company's products and will purchase same again.

Have 4 of these in 77mm, a 67mm & a 86mm. For the price, they're good, no noticible image quality issues, easy to wipe water off of. They do scratch fairly easy so depending on your usage you may need to replace yearly, and when used without a lens hood in sunlight or directly into sunlight you get blue ghosting (could be worse, but I remove it when shooting towards sun).But quality vs cost, these are definitely the best option.

Bought a new camera recently and needed a new lens filter. I came across this one in my search and decided to give it a go. It arrived quickly, and was in a hardshell type case which was nice to see. It was easy to screw onto the lens and has decent picture quality. Overall a good "beginner" type filter.

this is awesome filter. picture quality remains perfect with the filter and great for protection you lens.highly recommended