recently purchased a Sigma 150-600 DG DN, and needed something to protect the front element from dust and light scratches. It came in a nice hard plastic case, and came with a microfiber cleaning cloth. It screwed on smoothly, and has large scale "knurls" to help grip the outide of the filter when screwing it on to the lens. I have the Japanese Slim Optics version of a K&F Concepts UV Filter, and this one has noticably better refelction handling, especially with sun glare.

am quite impressesed with K&F Quality. Its so clear (due to low reflectivity) that its hard to believe I've a filter on.

It fits my camera lens very well. I have the UV filter to prevent a blue cast and protect the lens surface. From what I've seen so far, I recommend the K&F UV filter.

recently purchased the K&F Concept Nano-X Ultra-Low Reflection UV Filter HD Optical Glass with 28 Layers and I am thoroughly impressed with its performance. Here are a few reasons why I consider this filter an exceptional purchase for any photographer: Build Quality The filter is constructed from high-definition optical glass, ensuring stunning clarity and exceptional durability. The 28 layers of coating provide additional resistance to scratches, dust, and water, ensuring that the filter maintains its quality over time. Image Clarity One of the most notable features of this filter is its ability to maintain image quality. The ultra-low reflection prevents any distortion or loss of detail, delivering crisp and clear images every time. This is crucial for achieving professional results, especially in demanding lighting conditions. Additional Protection The UV filter offers excellent protection for your camera lens against ultraviolet rays, which can cause long-term damage. In addition, it acts as a protective barrier against external elements like dust and moisture, prolonging the lifespan of your lens. Easy to Use Mounting and removing the filter is very simple thanks to its smooth and precise thread design. There are no jams or difficulties when attaching it to the lens, which is very practical during photography sessions. Value for Money Considering the high quality and multiple layers of protection it offers, the price of this filter is very competitive. It is an investment that provides considerable value, improving both the quality of your images and the protection of your photographic equipment. In short, the K&F Concept Nano-X UV Reflex Filter Ultra Low HD Optical Glass with 28 Layers is an indispensable tool for any photographer looking to protect their lens without compromising image quality. With its excellent construction, ease of use, and unmatched clarity, this filter is highly recommended. You won’t regret having it in your kit!

I needed a good high quality filter to protect my 18-135 Canon lens. Was very satisfied with this product.

The filter works as expected and looks good too. I'd happily recommend it.

Exactly what I needed and the usual value from K&F. Thank you

This is a nice filter, the anti reflective coating is one of the best I've come across and it's nice and thin so doesn't vignette on wide angle lenses. Well worth the money.

Solid and perfectly clear

Fully corresponds to the description.