Amazon.com : 77mm Circular Polarizers Filter, K&F Concept 77MM Circular Polarizer Filter HD 28 Layer Super Slim Multi-Coated CPL Lens Filter (Nano-X Series) : Electronics

I'm far from being a pro in photography, I shoot as a hobby with a Sony RX10 Mii, so these filters, the polarizer and the variable ND do an excellent job for me. They're not the top of the line, but, for sure, they're also not bottom. The polarizer does its job in cutting reflections, and the ND does a good job in cutting off the quantity of light entering the lens. The built quality is good, easy to screw them on/off, not to stiff and to to lose when rotating. All in all, in my opinion, a good investment.

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.

Edit: I received a full refund from K&F, no questions askedThe 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

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 Features1. 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.BenefitsImproved 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.PerformanceIn 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.ConclusionThe 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 useCons: May require frequent cleaning to maintain optimal performance