LOL ya it is a China copy of singh-ray vari-nd filter. It is not common here so dont worry about your low knowledge of it. I just read up on some forum but could not find a comprehensive review side by side comparing the both.
There are advertiser selling it in CS. I am sure there are user here using it. Singh-ray will be way better but how does it compare to LCW china make copy.
Just like people are buying Expodisc and Mennon white balance cap.
Anyone have one? Create a good review of it! Cheers!