Outstanding gray filter - strong buy recommendation

I have now some gray filter, and especially during long exposures in the day often comes the desire for a stronger filter as a ND3 on. The ND3.6 takes off again 2 aperture light more and is this desire by now.

The filter is processed perfectly, milled the frame and clean the threads are free of burrs and can be without problems use (frame's really around). Visually, the filter is just great. He has less color shift (minimal bluish outgoing) than the uncoated ND3 filter of Haida and it shows a smaller loss of contrast. A dissolution or loss of sharpness, I could not tell with my Nikon D750.
There is nothing you could criticize on this filter.

I can only recommend the ND3.6 of Haida because it is relatively cheap and affords no weaknesses. On the contrary, in my opinion it's the best ND filter provides the Haida!