K&F CONCEPT 49MM Polarising Filter Circular Polarizing CPL, Ultra Slim, Japan Optics, Multi Coated, with Cleaning Cloth (Nano-K Series)

Very impressive quality at a good price.

Really nice filter I got some awesome pics with it

Update: K&F have been in touch and sent me the X Series filter that does work fine at all focal lengths. Much better customer service than I originally received. I’ve changed the rating to 4 stars, as this filter did work really well while not at full zoom, and may not cause any issues at all to smaller lenses. It’s well priced and fits and works well. I just wish there was an acknowledgment of the known issue at higher focal lengths in the description to better inform customers. Original review: Very disappointed. The filter does work well, as long as you don’t use your lens at full zoom. Obviously while you’re out you definitely want the ability to shoot at full zoom, 200mm for me, but you can’t as the photos are completely blurry. I did contact K&F for assistance, their reply was that the issue is because I bought the K-Series. And if I now spent more money and bought the X-Series it “will likely eliminate the focusing problem you’re encountering.” As a gesture of good will they have offered a 20% discount, but I don’t feel that’s good enough. There was nothing on the product description to say there is a known issue with this filter, and I don’t think I should be out of pocket any more than I already am. Because of this I couldn’t recommend this filter. Two quick, unedited photos attached showing without and then with the filter at full zoom. Photo is unusable!

Edit: I have upgraded from 1 star to 5 stars to reflect on the outstanding customer service I received. I had a problem with the filter I received but the company got in touch with me and offered me a refund, replacement, or an alternative filter (which they despatched almost immediately). The filter they sent me works beautifully. Things go wrong sometimes and I was very impressed with how well and how quickly they responded to this. I would have no hesitation in purchasing from the again Fits easily and turns easily, Works ok for wider shots, but on full zoom the image is unusable. I took two shots with a Nikon Z6 and the 28-400mm lens, shot on manual at 400m, F/8, 1/320s, ISO 100 The first one is with no filter and the second with the K&F filter. It's cheap so not worth returning but I will need to buy something that works at 400mm

Great fit great quality

This is a great filter with no visible vignetting, however the lens cap doesn’t seem to fit in my experience (82mm canon). No colour cast over the photographs. Sometimes can be difficult to remove from the lens but comes off eventually.

Due to the anti-vignette design, it is very thin despite having a freely rotating ring for the filter element. If there’s any sort of recess it is incredibly difficult to get it screwed on tight enough, that rotating the filter won’t also unscrew it. Virtually incompatible with clamp-on matte boxes. Works OK on regular lenses without accessories.

This is one of several cpl filters I have bought from K n F Concept. They are all fine. If you are unfamiliar with this filter effect, try it- it's a must have.

It's great. Really improves color (just be patient and rotate the filter carefully), gives much better (optical) result than image processors. You'd lose 1-1.5 F but worth it. Could even be very useful in darker environment where sporadic light sources are present. Not exactly cheap but good investment in thousand of photos. Shipping was fast. Thanks.

Disappointed. Not as described. It just mskes a shade on picture.

Like, the headline says, this IS technically the low-level when it comes to K&F filters... however, it performs wonderfully. For me, I had no issues using it and noticed no lack of detail or focusing ability. If there WAS any detail technically lost, it was more than made up for with the clarity of the image without glares. Obviously, the effect was most noticeable on windows, rivers, etc... but in certain circumstances try using this for portraits and you'll notice some of the specular highlights dissolve to create a more even result! This was something I accidentally discovered, but later found out is a fairly common use. I 100% would recommend having this as a new photographer or even maybe as an older photographer. If you're just a hobbyist photographer, this will help out and it will not break the bank. You won't notice any difference between this and a $400 CPL until you start getting technical with how you want to push your composition. At that point, you can look into higher "quality" glass, but in general, I see no problem with this filter for general use and always carry one in my filter case either as a backup or to use in dusty weather, rain, etc to keep from harming my nicer filters.

Need I say more?

Good, it removes reflections very well and doesn't soften the image quality, just dont do my mistake and getting it thinking it removes lens flare too. This CPL filter only removes reflections not lens flare👍 . U can remove lens flare by using a lens hood or slightly changing ur angle or position. but this filter? It Wont remove it, nor any filter in the existence could do that