The product actually works very nice how it supposed to work. I liked it very much but it was a little bit overpriced when I bought it. Also it makes some black artifacts when you maxed it out. I used it with my phone for dimmed shots in pro mode. Overall I will do 5 star since it may work better depends on condition you and purpose you are using this for.

I bought this and the Kodak 52mm ND filter for my Moondog Labs Anamorphic Lens and shot on my iPhone 12 Pro Max. I thought I could save $14 by settling for the cheaper Kodak ND filter but the image quality couldn't compete with the K&F one. Compared to the K&F filter, the Kodak has a greener cast, washes out colors, isn't uniform, and X-patterns A LOT earlier than the K&F Concept so the Kodak is not true ND2000. I went out on a bright day and with the Kodak filter I couldn't even get the highlights to be saved before a severe X-pattern started showing up. Locked shutter to 1/48 and ISO to as low as possible. The K&F filter also X-patterns a lot nicer too. When the K&F starts showing the X-pattern, it actually looks like a nice vignetting because it's so smooth. The Kodak filter looks too harsh like a hard X. No edge feathering (I don't know if that makes sense). I don't know how to explain it but you can buy both and see for yourself. The X is really wide and smooth on the K&F and it's even hard to tell it's X-patterning when you start reaching it's limit. Another thing I noticed is that the Kodak filter doesn't darken the entire frame. The left and right edges are brighter than the center whereas the K&F is uniform. I really wanted to like the Kodak as it comes in better packaging, but the filter just doesn't perform well. I LOVE the aluminum packing Kodak used for their filter, but the K&F Concept ND filter is the CLEAR WINNER.

We were doing a challenge, and shooting outside was part of it. So fun to see what a difference this lens makes!

So far so good. I have to actually take it out and try it out for long exposures. I filmed with it the other day and it was pretty solid.
Will update if more positive or negative.

Considering this is my first time ever purchasing a neutral density piece of glass here are a fee things to consider, This is probably one of the smallest rings that you’re going to get So based on my experience I wish I would have bought a much bigger in the filter with a step up adapter ring. The product itself to me is excellent although I have nothing else to compare it to. However, I know that I don’t see a difference in chromatic aberration’s or focus. I do see a tremendous difference in my pictures outdoors mid day now that I can use a lower stops I can get this creamy Bokeh look with out it being dark outside.

As soon as I added this lens filter to my lens I was ready to film in the sun.
That's what I got it for. To use a F1.4 lens in daylight.
Doesn't compromise camera quality when filming either

Fraction of the cost of a complete ND system. The craftsmanship is incredible. I own the 72mm and 58mm filters.

This filter works well with several of my Canon lenses. It feels very well made and I am confident that it is added protection for my lens glass as well. I appreciate it comes with a sturdy case that can be used when not on my lenses.

With this filter you can achieve cinematic footage due to the ability of being able to keep your shuttle speed down. This lens is amazing! A must have for anyone serious about getting high quality footage.

Works great