K&F CONCEPT 55mm Circular Polarizer Lens Filter with 28 Multi-Layer Coated | Ultra Slim High Definition Waterproof Scratch Resistant Polarizing Lens Filter(CPL) (Nano-X Series) FC701

The K&F Concept 82mm Circular Polarizer Filter is an essential tool for photographers looking to enhance the quality of their outdoor images. This high-performance filter reduces reflections, boosts color saturation, and improves contrast, making it an excellent choice for landscape and travel photography. Let’s explore the features, benefits, and performance of this impressive polarizer filter. Key Features 1. Enhanced Color Saturation: The circular polarizer filter significantly enhances color saturation, making skies appear bluer, foliage greener, and overall colors more vibrant. This feature is perfect for landscape photographers who want to capture rich and vivid scenes. 2. Reflection Reduction: One of the primary functions of this filter is to reduce reflections and glare from non-metallic surfaces such as water and glass. This results in clearer and more detailed images, especially in challenging lighting conditions. 3. High-Quality Optical Glass: The filter is made from premium optical glass, ensuring excellent light transmission and maintaining the sharpness and clarity of your images. The high-quality glass minimizes any potential distortion or degradation of image quality. 4. Multi-Layer Coating: The multi-layer coating on the filter reduces lens flare and ghosting, ensuring maximum image quality even in bright sunlight. This coating also enhances the filter's durability and resistance to scratches and smudges. 5. Ultra-Slim Frame: The ultra-slim frame design prevents vignetting on wide-angle lenses, allowing you to use the filter without compromising the field of view. The slim profile also makes it easy to attach and remove from your lens. 6. Easy to Use: The filter features a rotating ring that allows you to adjust the polarization effect easily. This user-friendly design ensures that you can quickly find the optimal setting for your shots. Benefits Improved Image Quality: The K&F Concept Circular Polarizer Filter significantly improves image quality by enhancing colors and reducing reflections. This results in more vibrant and professional-looking photos. Versatile Applications: This filter is incredibly versatile, suitable for various photography styles, including landscapes, travel, and architectural photography. It’s also useful for reducing reflections in product photography. Durability: The high-quality construction and multi-layer coating make the filter durable and long-lasting. It can withstand the rigors of outdoor photography, ensuring reliable performance in various conditions. Ease of Use: The filter’s design makes it easy to use, even for beginners. The rotating ring allows for precise control over the polarization effect, enabling you to achieve the desired results quickly and efficiently. Performance In terms of performance, the K&F Concept 82mm Circular Polarizer Filter excels in enhancing image quality. Photographers have noted significant improvements in color saturation and contrast, as well as effective reduction of reflections and glare. The multi-layer coating ensures that images remain sharp and clear, even in bright sunlight. The ultra-slim frame design prevents vignetting, making it an excellent choice for wide-angle lenses. Conclusion The K&F Concept 82mm Circular Polarizer Filter is a top-tier accessory for photographers looking to elevate their outdoor photography. Its ability to enhance colors, reduce reflections, and improve overall image quality makes it a valuable addition to any camera kit. Whether you're a professional or an enthusiast, this filter will help you capture stunning, vibrant images. Pros: Enhances color saturation and contrast Effectively reduces reflections and glare High-quality optical glass with multi-layer coating Ultra-slim frame design prevents vignetting Easy to adjust and use Cons: May require frequent cleaning to maintain optimal performance

I recently wrote a review of the K&F Series K CPL. The polarizer worked fine but my images were not sharp. I narrowed the issue down to it being the CPL I was able to return it with no problem. I've used K&F filters before and never had an issue so I figure I just got a bad one. However, rather than swap it for another, I spent the extra money and purchase the Series X polarizer which I received today. This one works beautifully. The ring turns smoothly with just the right amount of resistance so I know it will stay in place. My images come out sharp. The only issue I had was I used it in conjunction with a UV filter and I had a difficult time removing it. I read that it's not a good idea to stack filters with that as one of the reasons. I also read a review where someone also had difficulty and he simply turned the polarizer counterclockwise and was able to easily remove it from the UV. I'll try that and if I still have issues, I'll just use the UV filter when not using the CPL. The filter was nicely pack in its own plastic case and comes with three microfiber cloths. It was three times the cost of the Series K, but it was worth it! I've only had it one day and am very happy with it. BTW, the photos used in this review were not edited. I took them as RAW and exported to JPG. PS, I took Jim S’s suggestion about rotating the polarizing ring counter clockwise and he’s correct, it will loosen up. No specific number of turns but it loosens so it easily comes off. Thanks, Jim S.

Excellent value. Goldilocks of filters. Seems like a good compromise of multicoatings and price.

This is a really nice filter that unfortunately does not work for my application. I bought this to fit my Nikon Nikkor Z 180-600mm zoom lens, for landscape photography. It is very sharp, the elements are planar so do not distort, and it polarizes as I expect. The coatings help with glare and the possibility of fingerprints. The filter does a great job at its primary function: reducing glare on shiny surfaces. All polarizers have two rings with glass: a fixed back section that screws into the lens to which it is attached, and a rotating front part that provides the polarization effect. Rotating the front glass element as the rear remains stationary increases or decreases the polarizing effect. When you rotate that front ring, you always want to rotate it in the direction that tends to tighten the stationary ring so the polarizer doesn't loosen and fall off in your hands. As others have stated in their reviews, the rotating ring is very stiff. That in itself is not a problem, but when mounted on my lens it causes a real problem. The problem: the Nikon lens has a rubber ring around the outside that comes all the way forward to the very end of the filter threads. That combined with this ultra-thin filter means that there is only about 1mm of the back, fixed ring to grip when removing it from the lens. The stiff rotating element makes this filter become so tight on the lens threads that it is impossible to remove without a filter wrench, and very difficult to remove even with a wrench because most wrenches have a round cross-section so there is almost no gripping surface between the wrench and the back filter ring. I own several other K&F Concept filters and I wanted to keep this one. However, it will not work for my application so it goes back. If you have a lens that does NOT have the kind of front mine does, this may work very well for you. In particular, it is so thin that on an ultra wide angle lens it probably won't vignette even at 14-15mm focal length. PROS - Very good coatings to prevent reflections and help keep it clean. - Planar surfaces mean no loss of fidelity. - Very good polarization effect. CONS - Too stiff compared with other filters.

I just received my 77mm CPL filter and after reading about the filter getting stuck on lenses I decided to try putting it on a 77mm UV filter that I had on my lens. It screwed on smoothly and as I rotated the filter clockwise (as seen from in front of the lens) to tighten it, it came to a bit of a crunching sounding stop as the filter was completely seated in the UV filter. Then I tried removing it. Nope, couldn't budge it as hard as I tried. I put the UV filter with the stuck CPL on my camera lens to try it out as a polarizer. As I was rotating the CPL filter lens counter clockwise (as seen from the front) all of a sudden the CPL became unstuck from the UV filter and screwed off easily. I repeated this several times and it worked every time. Stuck, rotate the CPL filter counter clockwise and it unsticks. I thought there might be a particular rotation where this would happen but it doesn't seem to be that way. This just may be my CPL filter copy but if you can't get it loose, just try rotating the CPL lens counter clockwise slowly and trying to see if the filter threads get unstuck. I gave the filter 3 stars because of this behavior but the optical filter itself seems to work well as a polarizer. I checked to make sure it was truly a circular polarizer and it was. My method for determining this is to look at my LCD TV screen through it from the side that is normally closest to the camera lens. As I rotate the filter the screen seen through the filter goes completely black. This is because the light being transmitted from the TV screen is linearly polarized and when the linearly polarized layer of the CPL is at a right angle to the polarization angle of the light, no light gets through. The "circular" part of a CPL is a layer behind the linear polarizer which converts light that goes through it from linear into circularly polarized light. DSLR focusing systems can be fooled if presented with linearly polarized light so this conversion to circular polarization avoids that problem. To make sure a CPL is really a CPL, turn the filter around so the side normally closest to the lens is towards the LCD TV screen and rotate the filter and you shouldn't see any diming of the image coming through the filter (if you do the circular polarizer layer is missing). This is because the circular polarization layer of the filter is now being hit with the linearly polarized light from the TV screen and it converts it to circular polarization. Circularly polarized light wont be stopped by the linearly polarized part of the filter, there will be some attenuation but it won't be a function of the rotation of the filter. A day later: I have increased my rating to 4 stars. I tested the K&F CPL against a much more expensive B&W CPL I have that I bought about 10 years ago and the K&F performed pretty much identically as far as the polarization effect is concerned but it has slightly less light loss. The B&W loses about 1.3EV while the K&F only loses about 1EV. In the process of my testing I put the K&F filter on and off the lens about half a dozen times and I saw the same result with the filter ring loosening from the lens as I rotated the polarizer slowly counterclockwise. For my copy of the CPL at least that is the secret. I never touch the ring that threads onto the lens once I have it installed. It screws off easily with the rotating part of the filter once the threads release. Edit 5/5/2025 I was contacted the seller in April 2025, almost a year after my original purchase and they wanted to make sure I was a satisfied customer by sending me a new CPL filter with a magnetic ring, the filter and a magnetic lens cover. That product arrived and it looks great. I haven't had a chance to use it in the field yet but I have looked at the polarizing effect and it is very similar to the original filter I received which worked fine. I really appreciate their desire to have their customers completely satisfied! I am adding an additional star to my review as a result.

Edit: I received a full refund from K&F, no questions asked The images I took were nice, the glass is pretty clear for the money. The filter is very difficult to turn, like they used extra heavy grease in the bearings; every once in a while it lets loose and will spin ~5 degrees with no resistance. It has gotten stuck in both my new Tamron 18-300 and the Tiffen filter I bought for it. Broke a filter wrenches getting it removed from each. The threads machining in the threads is rough, that combined with the molasses-in-a-Vermont winter they used to lube the CPL guarantees it will be very difficult to remove. I’m guessing I got one from the end of the thread cutter head’s life on a Friday afternoon or Monday morning. YMMV

I use this K&F Concept 62mm filter for videography, and let me tell you — it’s an absolute game-changer. Whether I’m shooting in harsh daylight or trying to get those cinematic shallow-depth-of-field shots without overexposing, this filter handles it like a pro. The build quality is top-tier — solid metal frame, buttery smooth rotation (crucial for variable ND use), and the optics are ultra-clear with zero noticeable color shift or image degradation. I was honestly shocked at how clean my footage looked straight out of camera. Reflections? Controlled. Glare? Gone. Sky blown out? Not anymore. I’m able to maintain proper shutter speed in bright conditions without having to crank down my aperture or ISO — which is exactly what you want for smooth, cinematic motion blur. Also, bonus points for the slick protective case it comes with. Fits right into my gear bag and keeps the filter safe when I’m on the go. If you’re serious about videography and want professional-level control over your exposure and image quality without dropping hundreds, this K&F Concept filter is the real deal. Can’t recommend it enough. 🎥🔥 Rock-solid performance. 5 stars all day.

If you are shooting super-telephoto focal lengths, you are much more likely to notice a reduction in sharpness with a bad filter. That being said, I have noticed NO reduction in sharpness using this filter at 300mm. The cheaper option, the Nano-K series, will not stay sharp at 300mm in my experience. The difference is immediately noticeable, even without pixel-peeking. My recommendation: If you are shooting super-telephoto and care at all about image quality (which you probably would if you are buying this type of thing), consider this your "value" option, even though a cheaper one exists. Do not waste your time trying to save a buck on a cheaper option. Trust that I already tried that. This thing holds up great at 300mm, even on my crop sensors. My lenses aren't the sharpest in the first place, but there's not been any noticeable reduction in sharpness, and I have been pixel peeking A LOT. The motion is nice, rotating the filter feels surprisingly heavy and damped. It doesn't feel like it's going to rotate on its own by accident. It holds all of the lens caps that I've tried.

Does what it needs to do as a CPL filter, improved color saturation, eliminates unwanted reflections with no compromises on image quality. Came with a circular hard plastic case, and some cleaning cloth from K&F. Worth the investment for a photo-centric shooter.

Does what it needs to do as a CPL filter, improved color saturation, eliminates unwanted reflections with no compromises on image quality. Came with a circular hard plastic case, and some cleaning cloth from K&F. Worth the investment for a photo-centric shooter.

Bonne qualité, prix raisonnable .

I have several different K&F filters , and all of them have one huge problem - it's almost impossible to remove them from the lenses! I bought a 105mm CPL for my Sigma 105 Art lens, and I encountered the same issue. The filters glass quality is ok (No complaints about the glass at all) but there is a HUGE problem to take it off! Why didn't they provide special places on the filter to grab onto with your nails at least somehow? I have to use my Victorinox knife to take the filter off! Why is the filter ring that unscrews the filter smaller in diameter than the lens itself?!!! Have you ever tried screwing and unscrewing this filter??? Try and show us how to do this in easy way! This will be my last purchase from K&F!!!

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