Lee and Hitech filter are popular brands. But, what about Haida? Honestly, I just heard this brand some months ago while looking for filter holder for my Nikon 14-24 lens (read in review NiSi 150 Holder system).
So I did a little test for these three filters. Just to give a little more information, Lee Big Stopper and Haida ND3.0 are made of glass, while Hitech ProStop IRND is from resin.
For this test, I used Nikon D750 with Nikon 16-35mm f/4 VR. I took the picture while the sun was shining bright. All the pictures below used WB Direct Sunlight (5300/ +7), and JPEG straight out of camera. So, here we go.