Use it on my 50mm lens it was an item that was missing there it was variable, I don't have to carry more lenses.Recommend.

Professional overview of lens. Sits in sturdy plastic compact case. Upon inspection, lens, clean and sturdy. Easy to connect to my Nikon lens. After a few quick shots, I'm pleased. Will have fun with this lens. Lens cloth good size, not a strip of cloth. Supplier very conscientious, pleasant and helpful too. Arrived on time, supplier followed up. Professional shipping packaging.

I should start off by saying this is my first sliding ND filter so I have nothing to compare it to. However, it does what it should do. For the price, I think it's a steal. I noticed some tinting of the image or discoloration when setting it as dark as it can go but if I moved it a hairline it was fine so overall I'd say this is a good ND filter. Atleast for beginners.

Vibrant colors!

Works well, just has a lot of flare if you are shooting outside. Would recommend you have a setup with rails and matte box.

 The K+F Concept 52mm slim Variable Fader is a great item to have for a few reasons, but its primary function is to remove shadowing/reflections off of water and other non-metallic objects. I was really impressed with its functionality and just how well it attached, and I was equally impressed by the design and easily it could be used. Like other filters, this threads on, and you can easily turn to adjust it to meet your needs. The filter is also stackable, so you can place other filters or a cap on top of it, which is great for added effects and for preventing scratches. Speaking of scratches, using filters also helps with keeping your lens safe, so using this not only adds a nice effect but can also keep random items from contact what is normally a high-priced item.I wanted to note the packaging as well and give props to the company because they created something that keeps your item safe with both hard plastic AND soft foam. This is probably the best packaging I have EVER seen with a filter and it made me really happy to see it.Please note this was supplied for sampling purposes and has been used multiple times before reviewing. As with any filter, play with it before going for your desired shots to make sure you have it down perfectly; that was a lesson I learned a while back and the learning curve was sadly steep.

Seems to work as described. Fairly cheap so i don't have unrealistic expectations. Can't wait to try it out on some long exposure daylight shots!

This works just as I expected it would. Not as good as individual filters would have been, but for the price it was a great compromise. Would get it again if I needed to.

I was surprised at how good this vari filter turned out to be for under $20! I needed a vari-nd to bring with me on my trip to Thailand as I was only bringing one lens (blackmagic pocket cinema with a panasonic 20mm 1.7). I normally use the Hoya ProND (one of the very best ND filters) but I needed some more practical for a vacation as carrying NDs would not be. Looking at the footage I've shot I'm very glad I decided on purchasing this as I haven't noticed any tint yet (though I shoot raw). Remember that there is a rainbow effect when used behind certain glass surfaces.