Quality in the filter glass.

I am very satisfied with the optical quality of this filter. Especially in comparison (e.g. with Cokin) stell

Over the years I have tried filters for my camera lenses from a number of manufacturers and when I tried the K&F glass filters I didn't look anywhere else. K&F Glass filters outperform around 80% of other manufacturers. I am a long-time nature photographer featuring landscapes and wildlife in their natural habitat. If I'm out in the rainforest and I'm focusing on a cougar, I want the first shot to be the best because I might not take a second one.

I have used numerous filters, from Cokin, to buying several for different sized lenses. And, I do a serious amount of light and strobe painting (do a you tube search, if you're curious). So, when I dropped my super expensive ND filter, I was crushed! Right up until I found this K&F Concept ND, which offers a "Variable Neutral Density". Imagine looking at purchasing an ND Filter for the Typical four hundred bucks (and, that is only for a single fixed ND number)? Oooor, grabbing this well constructed, high quality ND filter that you can adjust to your liking ON THE FLY! Still thinking...
Buy it Bonehead!

It is a variable and polarizing ND filter.
The ND is 5 steps, there are 2 steps, 10 steps (ND1000, 1024 to be exact).
The polarizing filter eliminates light reflections on surfaces, cars, water, glass and also enhances the colors of the sky, leaves, asphalt, etc... (for more information search the web) Personally, I use it for video so as not to reduce the depth of field by closing

the Losing membrane (f9 further, I can now go to f2.3 without burning the frames from excess light). Haven't removed it from my 35mm in a while, I love it.

The filter is made of metal and glass, presented in a hard plastic case for storage. The protective and anti-glare layers of a greenish color are appreciated and you can put the lace on top that holds quite well without staining.
The lever changes the density of the filter and the other ring moves the polarizing filter. You need to pay attention because you can move both carefree.

In the pictures you can see the filter attached to an adapter, (Step-Up 49mm to 67mm) this is because I have filters of 67 and 49, my advice is to buy big filters and then "Step-Up" adapters.

About the picture quality. Excellent: There are no dominants, no chromatic aberration, no loss of definition, no appearance of the gradual ND filters' terrible X.
I have a very expensive polarizing filter and I hardly notice the difference with this one.

As a negative point, although I said before, be careful when handling one of the rings so as not to move the opposite.

**If it was helpful to you, remember to upvote so we can help each other** :)

I have used numerous filters from Cokin, buying several for different size lenses. And I do a serious amount of light and strobe painting (do a YouTube search if you're curious). So when I dropped my super expensive ND filter I was devastated! Until I found this K&F Concept ND that offers a "Variable Neutral Density". Imagine buying an ND filter for the typical four hundred dollars (and that's only for a single fixed ND number)? Oooor, grab this well constructed, high quality ND filter that you can tune to your liking ON THE FLY! I still think...
Buy it Bonehead!

I used Neweer variable ND filters before, but the glass became loose and they didn’t stick where I set them very well. These KF filters are smooth and not too loose and don’t do anything weird to the footage/photos (my Neweer created a bit of a purple trim on things).

I trust these ND filters and they’re my go to anymore, even if they cost a little more. Sturdy and should last a long time.

It is a variable and polarizing ND filter.
The ND is 5 steps, there are 2 steps, 10 steps (ND1000, 1024 to be exact).
The polarizing filter eliminates light reflections on surfaces, cars, water, glass and also enhances the colors of the sky, leaves, asphalt, etc... (search the internet for more information)

Personally, I use it for video so as not to lose the depth of field by closing the diaphragm (f9 next, I can now go to f2.3 without burning the frames of excess light). I haven't removed it from my 35mm in a while, I'm thrilled.

The filter is made of metal and glass, presented in a hard plastic case for storage. The protective and anti-glare layers of a greenish color are appreciated and you can put the tip on it, which holds quite well without coloring.
The lever changes the density of the filter and the other ring moves the polarizing filter. You have to pay attention to it because you can move both carefree.

In the pictures you can see the filter attached to an adapter, (step-up 49mm to 67mm) this is because I have filters of 67 and 49, my advice is to buy large filters and then "step-up" adapters.

About the image quality. Excellent: There are no dominants, no chromatic aberration, no loss of definition, no appearance of the terrible X of gradual ND filters.
I have a very expensive polarizing filter and I hardly notice the difference to this one.

As a negative point, although I said earlier, be careful when handling one of the rings so as not to move the opposite.

**If it has been helpful to you, remember to vote positive so that we can help each other**:)