K&F Concept 40.5mm Neutral Density Filter, 40.5mm Slim Variable Fader ND Filter Adjustable ND2 to ND400 Filter + Cleaning Cloth

Phenomenal value for the quality you're getting. The function feels high quality at a low price point. easy to put on and off and comes in handy for all kinds of scenarios.

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!

The K&F Concept 67mm Variable ND2-ND400 Filter is an outstanding addition to my camera gear! It provides excellent control over exposure, allowing me to shoot in bright conditions while maintaining proper image quality. The filter is well-built, easy to adjust, and produces smooth, even results without any noticeable color shifts. Whether you’re a photographer or videographer, this filter is a must-have for achieving great shots in varying light conditions. Highly recommend!

For the price this filter is well made and gets the job done. The step downs are perfect increments for my needs. My only issue is that at times I get 1-2 green flare spots on my image, especially in really bright sun. Tends to ruin the image unless able to use AI to remove. I have cleaned the lens and filter repeatedly so it definitely appears to be a filter issue. Also impossible to put the lens hood back on over the filter which might just offer enough shade to prevent the flares.

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!

Absolutely love this filter.

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.

Nice filter. Had it one on my Sigma 30mm and it worked great but with my new lens Tamaron 28-200 it is AWFUL! Was wondering why my photos were slightly blurry and thought it was the lens but come to find out it was the filter. I dont think its made for Zoom lenses.

Zeer goed top

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