Per Breakthrough literature and white papers, the ND 6 seems much more effective than a competitors ND 10 which I have been using.

This is the second Breakthrough XD4 ND filter I have purchased and I am absolutely delighted with them, everything they claim regarding it being the sharpest most colour neutral ND filter available has proved to be absolutely true

True, it's one of the more expensive ND filters available but the quality is more than worth the price

True, it's one of the more expensive ND filters available but the quality is more than worth the price

This ND has been great as I have been doing some longer exposures.

Great ND filter