37mm ND2-ND32 (1-5 Stop) Variable ND Filter and CPL Circular Polarizing Filter 2 in 1 for Camera Lens Nano-Xcel Series

I bought one of these filters to try because I was tired of stacking a fixed ND and a CPL filter.
I fell in love with the results and bought 4 more in different filter thread sizes so all my lenses had one of these CPL+VND filters available without the need for a step up ring.
100% worth the investment for photos and videos of cars or really anything that would benefit from having that level of control over your ND and CPL at the same time.
I use one of these filters on literally every single daytime outdoor shot, not EVERY ONE WITHOUT FAILURE.
I can't say enough good things about these filters for my work!!!
& yes, I paid for all filters out of my own pocket, not sponsored.

Very nice to be able to adjust both ND and CPL from one filter. However, you must be careful because adjusting the ND filter can also accidentally rotate the filter and adjust the CPL unintentionally.
Works great on my Panasonic GH6!
The GH6 lens cap kind of works there, but there's not much to grab. I would recommend a 67mm lens cap

It's easy to use...fits my Zeiss 16-35mm and my 24-70mm and gives me very nice results...allowing me to dial in the right amount of exposure for the effect I want!

It is a variable and polarizing ND filter.
The ND is 5 steps, there are doubles, 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 videos, not to close the shutter losing depth of field (f9 onwards, now I can go to f2.3 without burning the frames due to too much light). I haven't removed it from my 35mm for a long time, I love it.

Better than expected

I have always been a fan of K&F after buying their tripod, so I was pretty sure about the quality of ND.This is 1of 3 NDs I have purchased for my crew, and I should say this is amazing.I would start with the build quality, and it's pretty sturdy, the casing is aluminum and lightweight.Coming to the colors, I didn't see any difference in colors with ND on at Min and ND off. Also, the cutting down of light from ND 2 to ND 32 is so accurate for an ND(measured with exposure meter).

During the window test, when we set ND to the maximum value, I didn't notice X.

My choice fell on Polar Pro or K&F. Well, now I know the answer! This filter exceeds my expectations! The high-quality processing is PRO. You'll see when you run this filter on your lens, after all I don't need two separate filters on top of each other. From now on, I've stopped buying cheap filters, especially if you have a loan that costs over $1000. K&F did a great job here and for the price it's fantastic!

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.

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Works great, has smooth action, and kills two birds with one stone by being able to spin and kill reflections. The only complaint is incompatibility with many lens hoods, but well, it's better to reduce the diffraction and hit your target than eliminate the diffraction and have to jump through hoops to get a decent shot.