K&F Concept55mm Variable ND Camera Lens Filter ND2-ND400 (1-9 Stops) + Filter Cap + Cleaning Cloth 18 Multi-Layer Coatings Adjustable Neutral Density Ultra Slim for Camera Lenses(K-Series)

This actually exceeded my expectations. It's not perfect, but it's cheap for what it is. A variable ND will have downsides and a cheap one even more so. I originally purchased a different even cheaper filter just for one use, but it made the image so soft and tinted I found it unusable. This one I tested on the Sigma 18-50 F2.8 and I was surprised to find it usable. It adds a bit of tint at all strengths, a slight yellow green, almost like a touch of sepia. It barely reduced the sharpness of the lens. That's quite good for a cheap variable ND filter. It's good enough that for my use case I'm comfortable correcting the colors out in post.

The media could not be loaded. For BMPCC4KI have been using this K&F Concept 58mm Variable ND Filter for about a month now, and overall I am very satisfied with the quality and performance. It is well-built, slim, and comes with nice extras like a filter cap and cleaning cloth. The rotation is smooth and it fits securely on my lenses without causing vignetting at lower stops.In terms of performance, the “True Color” claim holds up quite well in my experience. Compared to other budget ND filters I’ve tried before, this one introduces very minimal color cast, which saves me a lot of time in post-processing. It performs beautifully in bright outdoor settings, helping to achieve silky smooth water shots and properly exposed videos without cranking up shutter speed.That said, like with all variable ND filters, you should be aware of the x-pattern (cross pattern) issue when pushing it to the higher end of its range. Once you go beyond about 7 stops, the x-pattern can start to appear, especially with wide-angle lenses or if shooting in very bright conditions. This isn’t a flaw specific to this product, but rather a limitation of variable ND filter technology in general. I simply avoid maxing it out and plan my shots accordingly — staying in the lower to mid-range stops avoids the issue completely and still gives me plenty of flexibility.Overall, for the price, this ND filter delivers fantastic value. It’s great for travel, landscape, and video work. Just be aware of how to use it properly to avoid the cross pattern effect. If used within its optimal range, it produces clean, sharp, and color-accurate results.Highly recommended for budget-conscious photographers and videographers who know the limits of variable NDs.

This thing is pretty amazing. I am new to videography and cameras. I have spent the last year just watching a lot of YouTube videos. As I get more into testing different cameras and different products I never thought to get an ND filter. I would just say that before you buy one learn about ND filters and ISO and WB, and this will help you understand why and how to use the filter. I am using the filter to get some cool outdoor videos and this helps get that beautiful blue sky and focus on your subject. Overall I am beyond satisfied.

Great quality fits nice, good for adjusting in brighter lighting

I use a Sony A73 and one of my favorite primes is a pancake 16mm full frame lens. The size Ø49 fit it perfectly and it functions as advertised. I love that I don't have to change filters bc it is adjustable. I think it leaves a bit of banding on the frame, but it may be bc of the specific lens. I will do my best to keep up with it bc it's a great accessory.

Good and filter. Feels quality and glass is clean.

Todo funcionó correcto

Gave this a shot after needing to shoot some video with a wide open aperture on my Canon RF 35mm f/1.8 lens.What's there not to like! Great quality, not overly expensive, fits and functions perfectly- I was worried about the X-patterns that sometimes happen on variable ND's, and am happy to say that I haven't once experienced that on this filter.Like most filters, it protects the lens from scratches too, so there's that. Not too difficult to rotate the variable ND, however it doesn't have a stopping mechanism, so if you rotate it too far past the maximum ND, it'll gradually rotate into the minimum amount. Not annoying enough to deduct a star, though. Overall, I'm happy with it!