This review is for the product and not the seller.This product has a different inner (77mm - seats on camera lens) and outer (82mm - lens cover) thread size.The inner thread seats properly into my camera lens at 77mm. However, it requires a bigger 82mm lens cover.The optics are made of glass and with the wide selection of ND settings, this is a good filter to use on a daily basis.Furthermore, this is very reasonably priced. I am satisfied with this product.

This is my third order from Gobe and I will continue to use them for filters. This is my second Var ND filter the first was for my DSLR and this one for my GoPro setup. Both came package well with cleaning cloths they have performed as advertised, no color cast in my pictures or video.

I had been meaning to buy a variable ND filter for my 24-70f2.8l for a while. When I heard about K&F filters; having tried a 3xnd filter kit pack that I was impressed with; especially at the price. I looked at K&F's other products and found this more than reasonable price ND filter and had to give it a go.The filter is shipped from China; so its not something to order if you are in a rush - but when it did arrive I was blown away by the quality of the presentation. The filter was packaged inside a well designed; expensive looking, cardboard outer package and then a hard plastic inner with a foam sheet to allow it some protection.On opening the pack one disadvantage to this filter immediately manifested itself; the front element isn't 77mm so your lens cap won't go back on the lens with the filter mounted. The filter mounted smoothly onto my lens. The variable darkness is achieved by rotating the front element; as you would a circular polariser. The K&F filter spun smoothly but with enough resistance to keep the darkness you set so knocking it won't change the setting. One disadvantage to the design is the filter doesn't have coded ND values so there is a bit of guesswork to get the right exposure for stills.I tried the obvious and took an image of a plain white wall at various ND settings; and there was some minor differences in the brightness of the photo - it was a bit lighter at the edges of the frames. At its darkest on long exposures; the 6d went red shift but this is correctable in Lightroom (and made much easier if you use a colour checker passport.) If you zoomed in on the plane white background you could see some variations in darkness; and ultimately pixel peeping at maximum darkness a mesh. That said taking pictures of something more interesting than a wall the effect was lost in the detail of the image.I rarely shoot video so for you dear reviewer; I shot some test video of the same white wall. I don't have any fancy video editing software and just watching the video back in lightroom; the darkening effect was pretty uniform across the photo. As with stills if there were any criticism it is very minor and that the corners show up brighter than the centre of the frame. The majority of the frame being uniformly dark. There was no patterning showing in the video.Using a standard ND filter definitely gave a more even darkness to stills but I am planning 3 long trips this year and carrying 5 ND filters everywhere felt like a chore. Now I just need one. If i could I would ding 1/2 a star for the front element size not being 77mm but its a minor inconvenience in the scheme of things.

Great ND filter for Rokinon Lens. Working as expected.

I do not use these for the UV filter but as a good quality, low cost lens protector. That said:My 1st Tiffen was a 55mm UV Protector I got for the kit lens that came with a Sony a7ii; an FE 28-70. I was so happy with the purchase that I have since purchased three additional Tiffen UV Protection Filters. One is on a Sony E 55-210 I bought used and one is on a Samyang 35mm I bought new. The one I am writing this review for I assume is still on the Sony FE 50mm I bought new but returned and forgot to remove the filter.The point? I treat my lenses, new or used, like I treat a cell phone. That being the phone stays in the box until I have a protective case for them and lenses stay in the box until I have a protective filter to pair them with. And the one I forgot to remove from the returned lens? That is how confident in the Tiffen filters I am. Once I put one on a lens, I never need to think about it again.I have used several brands in several sizes ranging from the cheaper Altura and Polaroid to the mid range Hoya and B & W.Where does Tiffen fit? Well they are no Hoya or B & W but I am no professional photographer. I am an amateur who mostly enjoys street photography when I travel and for my money Tiffen is the best. Yes, you can spend more and get better glass and if you really have reason to worry about ghosting you should look for a higher end lens. That isn't me saying ghosting has been a problem for me. I normally use a lens hood and I think that helps cut down on light reflection. I have noticed some minor issues with it on some shots I have taken in direct bright light conditions but not enough to justify the higher price.I do not stack filters as I haven't had a need to so I can not give an opinion on that topic. I would assume that the risk of ghosting would increase.The short version is this. The Tiffen UV Protection Filter is well made with good quality glass and a metal ring with threading I do not worry will cross thread or strip. They do what I need by protecting my lens. If I was buying a ND or polarizers I might buy a more costly brand but for everyday protection, Tiffen is all I need and the best for my money.Tiffen say it best in their own product description; A small price to pay to protect your investment.

Tiffen makes a good quality filter and (in addition to a ND) a CPL is probably one of the few filters you can't "recreate" in Photoshop.

This is an amazing deal. Not just for the Polarizer or ND Filter. The TWO Lens Hoods are well worth it also, plus 2 carrying cases pluslens cover and cord/plastic attachment so as not to lose the lens cover. Regarding the polarizer > it works great. Hopefully my attached image ofcar reflections makes it in here. It also takes the shine off leaves, if you turn the polarizer dial. I tried other filters at camera store costing over 120$ and don't see any differences. For the price and number of items and lens protection this is well worth it.

The threading of the filter for the lens cap or threaded hood is not 82mm. I just purchased an 82mm lens cap and hood only to find out it is too large. Looks more like it needs to be a 73mm to 75mm thread. The 72mm thread for my lens is correct, however, and works well.Update 11/4/2020: Ordered a 77mm to 82mm step up ring. The ring fits and means that this is a 77mm thread and not an 82mm thread for the cap and hood. If you buy this filter, you will need a hood and lens cap for a 77mm thread.