I bought this thinking it would save me time taking my neutral polariser off one lens and transferring to another. This was a huge mistake. The vari works well but moves too easily making adjustments and keeping the shot settings almost impossible. Autofocus spent ages hunting for the subject and could not lock on, tried manual focus with little improvement but still out of focus pictures. an other wasted purchase IMHO. The none setting on the polariser has a .2 shade to it.
14/11/2019
This K&F variable neutral density filter works fine.I do not always need to use it so it has to be stored in its case most of the time.The problem is that the case is not specifically made for the filter size. Mine is 43mm in diameter but the plastic case is made for a filter as large as 82mm.At least K&F can make a cut out so that the filter would not slide around in the case.Also, the case opening mechanism is made reversed. It makes accessing the filter awkward and difficult.
02/10/2019
Easily the best bang for your buck variable ND filter. Probably the best VND under $100. I like what this filter does to skin tones as well.
31/08/2019
This isn't the latest and greatest. Certainly not going to put it up against the new Peter McKinnon ND Filter but for the money I'm quite pleased.
23/07/2019
First variable ND filter purchased (all others I have had have been static) and what a difference it makes!So easy to move around, and not having to carry more than one per lens is a real space-saver in the bag!I've experienced no false colour or the infamous X on any images (although I don't use this all the way closed!)Comparing it to a friends premium ND (I won't mention the brand), I could not see a difference at all in image quality. However, the premium ND was a bit stiffer to move around, so it felt like it would stay exactly where left. The K&F one does feel like it may loosen up over time, although this hasn't happened yet a few months in!
28/03/2019