I am usually against UV/haze filters due to concerns about their impact on image quality. However, I plan to use my Sigma 150-600 DG DN Sport (Sony E-mount) in fairly harsh conditions such as shorebird photography, surf photography, and sports. So I gave in and bought this filter to protect the front element of the lens. In view of the fact that this K&F filter would probably be classified in the “middle class” in terms of price, I wanted to test whether it actually had an effect on image quality. The attached image of a $20 bill was taken under exactly the same circumstances: 600mm at ISO 100, tripod with no OS. As you can see from the screenshot taken in the comparison view of my image editing software, the image on the right (with filter) is much sharper and richer in contrast. I am shocked! I was hoping to remove the filter if I wanted a better image. Now I can leave it on 100% of the time and just wipe away any spills or dust without worrying about scratching the front panel. Strong recommendation!
18/02/2026
This is one of those this that are so useful, functional and easy to use you just wish you found it years ago. Walking from inside to outside, taking off and putting back on in a second is so clutch. The construction is well thought out because there are notches on the adapter and base, that prevents accidental rotation, very well thought out. The fit is perfect and the price wasn't too bad.
18/02/2026
I've used it for video recording and it's great. The quality is very good and I haven't found any vignetting or X marks. I recommend it.
16/02/2026
I always get filters with anti-slip design when available. That makes a huge difference. I compared it to Hoya HD2. I took this on Canon M50 with Nikon 35-70mm f/2.8 AF ZOOM-NIKKOR. 1) No filter. 2) K&F. 3) Hoya HD2. Sure its not a great test but I cant tell any difference between the 3. The Hoya was visually as good as the K&F except it was so staticy I had to return it. I also didnt like that it was not anti-slip. The K&F is not staticy at all and very easy to clean. If there is no reflection it looks like there is no glass in the ring. Kinda like magic. Its very well made. I use it on my Zeiss 50mm f/1.5 Sonnar T* ZM. There is no play and it fits perfectly. Very happy with the purchase.
15/02/2026
I almost returned it when I discovered my lens came with a complimentary $50 Sigma lens UV filter. The optics are wonderful, but I'm about to go to Niagara Falls and figure I don't want to marry my lens cloth. I figured, why not test them both out under the sink before I return it? Glad I did! Like magic, this K&H filter drains and all the water disappears. The free Sigma filter? It sucks up the water! And it's hard to get it down! If you received a free high-quality UV filter and it stays dry 24/7, there's no need to upgrade. Do you value versatility in any climate? Buy this now!
12/02/2026
The filter comes with the magnetic adapter to screw onto your lens, but I bought it to add it to my UV filter (obviously magnetic) of the same brand so without needing the adapter in the package. I was afraid it could not be added to the UV filter as it does not have the same grooves as the adapter (to grip the ring of the variable ND filter so as to allow it to rotate), instead it can be used perfectly even like this.
Fully satisfied.
Fully satisfied.
12/02/2026
So I tried it out and I'm very happy with it. It was my first photo with the filters. I'd happily recommend it. Greetings from Enzianhonse!
10/02/2026
Great filter with good features at a decent price. I got it for around $23. About 3mm thick. Can be screwed on nicely. Hard case. 1 year warranty if you register your product on the website
09/02/2026
Quality is great and the magnetic is strong and locks in place with the thread provided which is awesome.
08/02/2026
As described. Quickly attached and unattach. VND has good number of stops.
05/02/2026