The product does exactly what it should and decent pictures are taken without irregularities. Of course not the image quality of real glass filters by 100 or more. One cannot and cannot expect that. For the simple hobby photographer, however, completely sufficient.

The filter works very well on my Sony Alpha 7 III with a Tamron 24mm F / 2.8. There is no cross formation or other unsightly effects. The workmanship feels good and comes in a practical plastic case. As always, the shipping was great with Amazon. I can definitely recommend the 67mm version of the filter. BUT, the filter may not take into account that well in other sizes.

Awesome filter, but be aware, autofocus wont happen if there is not enough light! Taht was my first lesson :)

For the price, this filter is really excellent, the images look great, and the little vignetting is very easy to remove in Lightroom. Highly recommended for those who need this filter occasionally and don't want to spend too much money!

I got this cheap filter for the first attempts at long exposure. For this it is processed quite neatly. In other words, the price-performance ratio is completely fulfilled! The quality of the surface coating still has to be proven in the future when the first dirt has to be wiped off the windshield. The filter was delivered in a universal plastic box, which (please contact K&F for all filter models) should be replaced in the future with matching lids with threads, as these are more space-saving and could be screwed to other filters!

For the price an absolute top filter does what it should

I found this filter excellent when properly screwed on to my lens, vignetting was visable when not properly fitted. It is quite shallow which also helps here.
Shots displayed are taken with Nikon Z6 & 14-30mm S line lens I had to stop down to F10 for 20secs & F13 20secs both shots ISO 50 to avoid blowing out the sun, shadows recovered in post processing.
The filter was very easily wiped clean after being splashed by a wave, I think the coating definitely helped here.

I am quite pleased with the product its defintely much better than my old 72mm

Great for the price. Do what i need

The filter is really good, it seems to be a real 10 stop filter (some ND1000 are only 8-9 stops, which makes shutterspeed calculations hard), it is reducing light in both Visible and Infrared light (has been tested on a full spectrum camera used for Infrared Photography), so you will not have a nasty discolouration in the sky as with other ND filters, but you will get a slight blue colour cast, nothing that can not be fixed in post process with the white balance tool, but I highly recommend doing a white balance setting with the filter on to get accurate colours, especially if you are shooting in JPG. I did not see any reduction in detail (see the 100% or 1:1 crop). It easily screwed on my lens and step up rings as well. It has a nice grippy area which I find giving a much better grip than other filters. One thing I'd like to mention is the case it's coming with has a nice locking mechanism and also two carve outs to be able to easily remove the filter from it's case, actually it's one of the best cases I've seen, beating the nice metallic cases from Gobe, which does not close well with larger filters.
If colour cast is a critical issue for you then this filter might disappoint you with it's blue cast, in that case I recommend Haida's NanoPRO ND1000, which I unfortantely lost, but that has virtually no colour cast at all, but nearly triple the price.

I am very satisfied with the ND filter. Can't see any color cast and the price is right too.