A very nice filter. So far I cannot complain. It does not seem to produce sun flares or any other noticable distortion like cheaper filters will.

Trying to shoot a long exposure photograph around sunset or sunrise with a standard ND filter can be a challenge. However, with this filter I was able to easily adjust to the changing light condition and keep my shutter speeds where I wanted them to be to ensure that I was able to capture the light trails of the cars in their entirety. The filter did not produce a color cast which is excellent for a filter in this price range. The team at K&F have a winner on their hands with this filter.

I would not recommend it to a friend, I bought it to use it for taking shots of the ocean against the rocks, well when I place it to Max it does not close the whole disc black but does a star shape so that in the picture the corners are blown out and it gives a lot of cross-polarization. I was told it is common when you buy variable density filters that are not fixed. I just bought and received the Image ND 2 4 6 replacement filter kit and worked much better for me for what I was trying to accomplish. updated - Oct 27th - I am told that to use this filter it is best used at a 90 degree angle of the sun, that is you place your sholder facing the sun then stick your arm out in front of you at that in 90 degrees to help with flare and cross-polarization.

I use a uv filter to protect the lens, but sometimes you get glaring if pointed near the sun as expected as they all do unless its coated. Good lens.

I bought this filter to use in bright sun light with flash without always having to use hss.

I used this filter to test the Gopro10 video with a lot of sun... It works as expected and I can get a good level of exposure and at the same time little bit more motion blur... Good product at a.good price. Raccomended for sure... Next time I will buy the "day kit" with more different filters. The material is robust and easy to mount. You can rotate the filter to add the polarization. Happy.

There isn't a whole lot to say about this filter, it's just perfect for what it is - and an incredible bargain...I needed a protective filter, 77mm diameter and I took a chance on this from Vivitar. - The one thing I can do with any filter is check if it is "flat" and I do that by making "sun spots" - reflecting the sun into some shadow area as far away as I reasonably can, onto some plain, light wall or whatever and I want to see a circular and symmetrical "fuss-ball" with no "funny artifacts" and that's what I got...from both sides of the glass...so it's a "quick'n'dirty" check for flatness...But the best test - and the reason I got this second filter from Vivitar - was some shots taken with the full moon as light source of a scenery that included many bright street lights, with a very wide angle lens...if there were problems - this is where they should have presented themselves, but there were none. Both lens and this filter performed perfectly - no glares or reflection where you really could have expected some...so, there is nothing to complain about.Add to that that the metal ring, holding the glass is very thin, yet solid and well made and you've got "Five Stars"....

I know little about photograph.The filter works well,but sometimes I can still see strong reflection on windows when I take the photo