+ Filter sits very well and firmly on the lens
+ Label is clear and easy to recognize
-The "Variator" is to use only half *
-When Pressing the "variator" has in my case often adjusts the sharpness as I generally work at LB's with manual focus and then I often accidentally came to the focus ring.
* When you adjust the ND-strength, there are sometimes strange artifacts in the images, as previously reported by others this can be quite annoying. I have it once reingestellt a sample image that is completely unprocessed by the color, etc.. One can not easily see the dark spots left and right in the image, which push their way through the regulatory ND-strength, zooming or focusing across the picture.
Conclusion:
Who wants to spend a little money, and those effects on pictures takes into account, for example, to how I incorporate into the picture, I recommend these filters.
However, I will give only 2 stars, because the filter does not really matter what he should do.
