JJC 67mm Ultra-slim Variable Neutral Density Filter (ND2 - ND400) for Lenses With 67mm Filter Thread

I was hesitant to buy filter as it was cheap and had average reviews but to my surprise it exceeded my expectations, there is only slight visible vignette on the 9th stop if full zoomed out on my Tamron 17-70mm, if I zoom in a little it is gone and on the 10th stop the x is slightly visible on 17mm and disappears if zoomed in.I was shooting in bright sunlight and was able to shoot at f2.8 with 1/50 sec, overall quite happy with purchase and would recommend to anyone who is not doing professional video shoots.

I believe with the price point my first experience with variable ND filter was very simple and good it makes a huge difference I was recommended by one of the YouTuber

All is good but when maximizing the X is there not all focal length is covered. but the same time. it can use for some motion blur when light is not too light.

the variable filter does what it says, reduces light for about 2 stops . and anything higher brings the "X" shade due to Polaroid lenses . in this the X shade is with a blue tint .. not useful for anything more that 2 F-stops

Internally shatered glass. Very bad quality of the product.

Works well, I just thought my lens cap would work so I don't have to keep taking the filter on and off. Was hoping to just leave it on all the time