Welp, after getting this and not having a need for it until, of course, 2 days after the return window had closed, I broke it within 15 minutes of starting to use it. The seller graciously replaced it for me and followed up with multiple emails to check in with me. Still getting to know the product but initial impression is good and the seller provided excellent service.

As soon as I got the filter I went to check it out, and I was pleasantly surprised by the really good quality filter, especially with long exposures to the sun - then there should be some kind of flyer on the filter, in short I enjoy this filter.
Recommend to anyone looking for a quality filter that will fit all lens sizes.

I'm not ready to purchase an expensive 10 stop ND 100mm filter system yet. So I want to try this one out. The picture quality is solid for the money. Pic 1 (no filter), Pic 2(this product), Pic 3(K&F 40-1, 10 stop ND). Obviously, this is a big step up from plastic one (pic 3). In pic4, the pin holding the filter holder hinge was so loose. If you lose the pin, the filter holder become useless. The pin fell off when I first open the box. I didn't realize that until I tried to put the filter holder on my z6. Therefore, I decided to blue tape it to prevent the pin from falling out. I think it is a good buy if you are a amateur photographer.

breakable，the ND1000 was already broke

I got this for the filter holder and adapters. They work great!Mad the filter that came with it is pretty decent.

Fits all the lenses on my Canon EOS 5D Mark II and my daugther's Nikon D5600, all the lens adapters make it a very good option instead of buying individual filters. Good price for the quality.Until now only water pics but it's just what I was looking for! Recommended.

The filter comes in a nice protective packaging and arrived in perfect condition. It is well made and represents a very good value compared to more expensive options/brands.

For such a low price, my expectations weren’t very high but boy this product delivers. For the price of a single screw on ND1000 filter you get a holder plus a 100x100mm ND1000 filter.Attaching the filter holder is simple: simply screw on the appropriate adapter from the supplied adapters, then snap the filter holder on by pulling back on a lever. Then slot the filter glass in one of the two slots and you’re ready to rock and roll.The holder holds the filter glass securely so there’s no worry of it slipping out, regardless of orientation. The only potential finicky part is attaching the holder to the step up ring — you’ve got to ensure that it’s actually secured, because it may seem secure but actually isn’t. After a little practice, you get the feel, easily.As for picture quality, it’s very good. Little to no color shift that I can see. Great clarity with no distortion that I can tell. It appears to not vignette at 16mm on my Nikon 16-35 f4, though I’ll have to doublecheck. Absolutely great value for the money.And as I mentioned earlier, there are two filter slots in the holder, so you could potentially stack NDs, or stack an ND and a graduated ND, or whatever. One thing that would have been nice would have been a way to also use a rotatable circular polarizer, but for the low price, I’m not complaining. Might end up picking up a square circular polarizer for when I’m shooting over water.All in all, in you’re trying to get into long exposure photography and want to try 100mm filters without breaking the bank, yet still get great image quality, this is the one to get!

I've used the filter several times and it works great plus the mount works great and have already used other filters with it...

This was the first filter set I purchased and it delivered it's purpose.