Excellent workmanship - Beware of the names.

The filter is meticulously crafted and delivers what it promises. I have in my photos no color casts or distracting reflections. The focus remains almost unchanged on a Canon 24-105mm f / 4.0 L IS USM.
Initially I was looking for a ND filter that gives me about 8 stops more exposure time. However, "NDx8" are just three stops, and not, as one might suspect, eight. I could have read previously. :-) Nevertheless, I keep the filter, because you also can easily screw before another ND filter it and thus add the stops.

Those looking for exposure time extensions of> 3 steps, with this filter: well served neutral density ND1000 77mm incl Pro Lens Cap with inside handle.. The brought a 10 f-stops, but is prone to slight blue stitches - but this is irrelevant so the RAW photography, as you can simply adjust the white balance.