This is an excellent quality circular polarizer and variable neutral density combination filter by K&F. I got the 77mm to cover most of my lenses by using step-up rings. The smallest filter size will be 52mm, seen in the photo. The filter is excellent for all it does and it’s reasonably priced. It’s much more convenient than separate filters; faster to use and less to carry in your bag. Also, this will work with some wide-angles that would be a problem when stacking multiple filters. The build quality of the filter is excellent. A leather storage case is included. There’s some very slight vignetting and color shift starting at 4 stops which increases with more ND filtration. That is expected and can be dealt with in post processing if desired. Image clarity and sharpness is not affected. This filter outperforms other CPL+ND filters I’ve used.

Like the title says. Best ND for this price point. In order for you to even see any softness this might cause you’d have to zoom in 300%-500% you’re pixel peeping at that point and if that’s what you are all about then this is not the variable BD for you. Color shift isn’t bad (don’t think you’ll get away from color shift by buying the more expensive brands either) I would highly recommend adding this Variable ND to your kit if you’re a photographer or filmmaker on a budget!

If you've ever tried to stack an ND filter and a circular polarizer, you know that it is a giant pain and usually results in a dramatic dip in image quality.

A useful workaround is to stack a normal and inverted polarizer on your lens to try to cross polarize the light coming in. It can work well, but can also be more of a pain to deal with than it is worth.

This dual filter is an amazing combo of the two most commonly used filters - the ND and the circular polarizer. Through some sort of witchcraft, they've found a way to combine both filters into one easy to use design. You can do the circular polarize and ND filter to get those beautiful images.

There is no distortion or X pattern. Color shift is minor and is on par with other high end ND filters.

I like the textured rings and heavy knob for adjustments.

I wish there was a way to have no ND filter as an option - so I could leave it on the lens all the time as a circular polarizer and then apply the ND as needed. It's not a huge deal, but would still be an awesome feature.

Great value!

This is a high quality circular polarizer variable neutral density combination filter from K&F. I used the 77mm to cover most of my lenses using step up rings. The smallest filter size is 52mm as shown in the photo. The filter is excellent for everything it does and it is inexpensive. It's much more convenient than separate filters; it is quicker to use and requires less carrying in your pocket. This also works for some wide angles, which would be a problem when stacking multiple filters. The build quality of the filter is excellent. A leather storage case is included. From 4 stops onwards there is a slight vignetting and color shift, which increases with increasing ND filtering. This is expected and can be fixed in post-processing if desired. Image sharpness and sharpness are not affected. This filter outperforms other CPL+ND filters I have used.

I really like the circular polarizing filter. The ND filters are a bonus as they add motion blur and can achieve faster shutter speeds.

It takes a little getting used to, but the value of a high quality mount, ND filter and a full circular polarizer with several adapter rings makes it a bargain. I can even use it on my 14-30 NIKon Z Len 14mm 14-30 with no vignetting once properly attached. An awesome kit. The ND is excellent and neutral. Recommended.

If you've ever tried to stack an ND filter and a circular polarizer, you know that it is a giant pain and usually results in a dramatic dip in image quality.

A useful workaround is to stack a normal and inverted polarizer on your lens to try to cross polarize the light coming in. It can work well, but can also be more of a pain to deal with than it is worth.

This dual filter is an amazing combo of the two most commonly used filters - the ND and the circular polarizer. Through some sort of witchcraft, they've found a way to combine both filters into one easy to use design. You can do the circular polarize and ND filter to get those beautiful images.

There is no distortion or X pattern. Color shift is minor and is on par with other high end ND filters.

I like the textured rings and heavy knob for adjustments.

I wish there was a way to have no ND filter as an option - so I could leave it on the lens all the time as a circular polarizer and then apply the ND as needed. It's not a huge deal, but would still be an awesome feature.

Great value!

Spoiler Alert: My ratings mean nothing. I haven't bought this filter yet. However, I see the question in my headline both in the Questions about the product and in several users below who ding the product because it uses two polarizers or the filter doesn't work with a CPL. The answer to the question above is misleading and those reviews below aren't fair. Above, the seller says you could add a CPL filter to this VND filter, (true) but, based on what I've read, the results of doing will be very unreliable. Here's why: all VND filters work using two polarizing elements. (Don't complain when your VND has two elements.) One element is a linear polarizer and one is circular. As you turn one, the filter darkens or lightens. Now imagine stacking a CPL filter on top of a VND filter. This really creates three polarizing filters - a linear polarizer, a circular polarizer, and another circular polarizer. That's a lot of polarization for a photographer to keep track of, especially if your VND filter is dialed down so you can't clearly see the shot, which happens with ND filters. Let's pretend you wanted to shoot waterfalls with a VND filter and a CPL filter stacked on top of it. Imagine creating this shot given what I've told you. I couldn't do it reliably. (I might get lucky.) So, if I wanted to shot an image that required both a ND filter and a CPL filter, I'd probably get much better results with both a standard ND filter, which removes the polarization, and a CPL. I hope this helps potential buyers of this item. I'm asking for this filter as a birthday gift. So I'm not a buyer yet, but I hope my wife will be.