K&F CONCEPT 77mm Variable ND2-ND400 ND Lens Filter (1-9 Stops) for Camera Lens, Adjustable Neutral Density Filter with Microfiber Cleaning Cloth (B-Series)

I've been very impressed with this item for the past 2ish years. It's been a durable design at a very affordable price. It fulfills everything that it said it would and is easy to install and use. My images are still very clear and not cloudy as I use the filter. It makes a huge difference in my image using this filter to help reduce the harsh light coming into my camera. There is a slight vignette on the image, but not drastically noticeable. The only downside is the lack of gauges to keep track of what stop the filter is at. It requires you to watch the LCD screen as you turn the knob on the filter. Still happy with the product, but wish there were numbers on the filter. Overall, highly recommend, especially for the price!

This ND filter is a fantastic addition to my photography gear! Made from high-quality AGC optical glass with 8 multi-layer coatings, it really reduces reflections and glare, resulting in crystal-clear images. The 1-9 stop light adjustment is incredibly versatile, perfect for everything from bright daylight shots to more controlled, low-light scenes. The 360-degree rotation offers precise control over the light reduction, although, at the highest stops, I did notice a faint cross-pattern ("X" effect), which is typical for adjustable ND filters on some lenses. The filter itself is sleek and slim, just 7.4mm thick, and the CNC-patterned edge provides great grip, making it super easy to attach or adjust quickly. I love the anti-glare finish, which minimizes stray reflections, especially in challenging lighting. One thing to note: you’ll need a 55mm lens cap for this 52mm filter, but that’s easy to work around. Overall, it’s an impressive ND filter with outstanding performance and durability. Highly recommend it to anyone looking to improve their outdoor and landscape photography!

A high quality variable ND filter lenses constructed from metal with excellent clarity and ND reduction. My only complaint is that I wish the indexing mark on the lens to show what your current setting is at was a bit more pronounced, but as is, it is more than functional.

Overall okay at lower ND settings but watch for purple color shifts at bottom left and top right at max ND setting (see video). Still worth the price, but watch image quality.

well built, solid construction. very slight color shifting with the filters but nothing too drastic. nice slow rotation speed which i appreciate so you can really dial it in. easy to use and fits perfectly.

Quality is far above expectations, thanks for exceptional product

Pretty good for the price highly recommended

Tried this on my 600mm zoom lens and it completely nullifies the auto focus and makes everything look smeary. I shouldn't be surprised since a 600mm zoom lens has so many layers of glass to shoot through, so I will likely look for a non-variable filter to put on it instead. Revising my review because support reached out and solved the problem to my satisfaction. Bumped up to five stars for proactive customer service.

The quality is great and it's exactly what I need for my zv-e10 kit lens.

It has got just about all your required settings. Ultimate & Optimum useful filter.

I ordered the 52mm filter because the 30mm f1.4 sigma lens for sony e-mount cameras has a 52mm thread but after lens arrived, I couldn't fit it on. But after-service support was pretty helpful in telling me this

Ottimo filtro a ND variabile io l'ho montato su un obiettivo Sigma per Lumix e per le interviste è perfetto non distorte assolutamente l'immagine

初めて使うのには良い商品かも。 場所に合わせて調整出来るのも良いですね。 もっと早く買っとけば良かった。調整が簡単なのが良いです。