This is my first experience using a Neutral Density filter, let alone a variable one, so I don't pretend to be an expert. I haven't had time to really play with this filter either; I just took a few quick shots to see what it does. However, I am impressed with this filter. It is clearly a very high quality filter. Even though this filter can be adjusted from ND2 (1 stop) to ND2000 (11 stops),l the frame is very thin and is made of high grade machined aluminum. The filter is adjusted by turning the outer ring; there are eleven marks to indicate the amount of adjustment, and the adjustment ring moves very smoothly with adequate resistance. The filter is made of multi-coated glass to reduce glare and other anomalies. On my 18-35mm lens, the lens hood will not fit with the filter installed, and neither will the lens cap. The three attached photos show how the filter can be used to reduce the amount of light. The three shots are from the minimum setting to the middle setting; all camera settings are the same except for the shutter speed. I tried some shots at higher filter settings, but the effect was too great (at least given my limited knowledge). While I still have a great deal to learn about using this filter effectively, clearly it has a great deal of potential. This is a precision device at a price that is much less than some other brands I have looked at.