K&F Concept58mm 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)

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 K&F Concept 67mm variable ND filter works great overall; smooth adjustment, solid build, and clear image quality. It’s perfect for controlling exposure in bright conditions and comes with a nice filter cap and cleaning cloth. The only issue is at higher apertures (around f/18 and up), you’ll start to see the classic black “X” pattern that can appear with variable NDs. Still, it’s easy to avoid if you stay in the lower to mid ND range. Great value for the price!

The quality is great and it have the perfect price. Comes with a soft cloth, box, and a hand grip. It's robust and worrk great.

The only other variable ND filter I can compare to is a B+W which was much more expensive. Compared directly to the B+W I would rate this as 2-3 stars, but at this price point it is easily 4 stars.I will be the first to admit I am not an expert in using variable NDs but this one was very tedious to find sweet spot in various stops without significant vignetting and I usually just picked a good somewhat dark enough spot with the least vignetting and used the camera and editing software to get the precise exposure I needed.If you're looking at this filter, at this price point, you'll probably be happy with it. But if you're thinking this may be too cheap and you should just splurge on a Hoya or B+W, then save your money and get the better filter. I was happy enough with it on one trip, but I returned it within the 30 day window and will buy a better brand, or maybe single stop, before I need an ND again.

Good and filter. Feels quality and glass is clean.

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.

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!

I’m a beginner photographer and wanted to explore with some filters so I chose to go with k&f variable nd filters as well as their 28 layer cpl. I’m super happy with the filters! I seen a lot of reviews stating they had issues with not being able to unthread the filter once it was on, and I have yet to have that issue with any of my filters, the filters do have very fine threads so I think it’s possible some people may be over tightening them or cross thread them, so as long as your careful not to do either of those it’ll probably be just fine! The last thing I’ll add is that if you plan to stack a cpl on top of the nd filter you will need a bigger diameter filter. I was unaware of that and bought the same size cpl so I was not able to stack them like I planned, so if your new to this like I am be sure to check what size filter you’ll need to stack them. alternatively though the nd filter will stack on top of the cpl, but everything I read says if your stacking, the cpl should be on top of the nd filter.