top notch for my wildlife shots

Good quality.

I bought this filter with no knowledge of the company. I still don't know anything but what I have observed: it seems to be quality construction and, most importantly, I took it out shooting and the clarity and visual performance of my favorite Nikon wide angle lens remains just as superb as ever. So, it's a quality filter at a very good price.

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.

Finely machined. Nice to handle. just the right amout of friction turning the knurled ring. Good gradient on the polarizer, very distinct. Some loss of light but images are crisp. Good price for a nice, clean piece of glass. Very low profile. Fits my retractable lens camera with no interference. ( Panasonic DMC FZ 28 ).

I am not a pro, I like photography and I am doing it as a hobby. Didn’t want to spend $100 for a expensive filter. Went with K&F for the price. High quality materials. Very slim . I was impressed. Got it in 82mm for tamron 24-70 g2. After getting this filter looked at K&F products and got few more things.

I took a beach vacation recently and wanted to protect one of my favorite primes from salty air and sand. The results were flawless, I didn’t find any chromatic aberration or fringing. The metal threading is a real plus which provides a secure fitment for peace of mind.

Great product for everyday photography. Does everything a great CPL should do. I haven't noticed any problems with it so far.I use it on my Sony FE 24-105 G and Sony FE 16-35 Zeiss lenses. No complaints except it's a bit hard to turn at the beginning so I managed to unscrew it several times so far. Guess I have to use it more often.

I love all the K & F Concept filters. Same quality as the most expensive ones on the market, but at a price I can afford. Can't wait to use it !