Seems to work as described. Fairly cheap so i don't have unrealistic expectations. Can't wait to try it out on some long exposure daylight shots!
04.06.2015
This works just as I expected it would. Not as good as individual filters would have been, but for the price it was a great compromise. Would get it again if I needed to.
14.05.2015
I was surprised at how good this vari filter turned out to be for under $20! I needed a vari-nd to bring with me on my trip to Thailand as I was only bringing one lens (blackmagic pocket cinema with a panasonic 20mm 1.7). I normally use the Hoya ProND (one of the very best ND filters) but I needed some more practical for a vacation as carrying NDs would not be. Looking at the footage I've shot I'm very glad I decided on purchasing this as I haven't noticed any tint yet (though I shoot raw). Remember that there is a rainbow effect when used behind certain glass surfaces.
28.03.2015
Came with small scratch on the glass near the ring. Image is not effected. Fit my lens perfectly. Its threaded so it stays put. Will not hold lens cap when installed on lens. Good filter.
01.02.2015