Haida NanoPro ND Filter (77mm, 7-Stop)

Works well. Just remember that if you are focusing through the lens, do it before you put on the filter. Once the filter is attached there is nothing but black in the viewfinder.

Not too expensive, good fit. Good for shooting video at the sun early morning/late afternoon without having to stop down too much.

I have used many 10 stop ND's in the past and settled on a BW but was never really thrilled with it. There was always something about the images that bugged me. I decided to test it , alone and then in front of a polarizer , each time I noticed a pretty noticeable drop in sharpness, especially fine detail smearing. Considering the cost of it this shouldn't be happening. So I searched for a new one and found an intense review of 10 stop ND's and the Haida Nanopro MC ND 10 stop was part of it. It came out on top along side one other, but with the price of this filter it was a no brainer to buy and test out. Straight Image, Image with the ND, and Image with both the ND and a Nikon Circular polarizer behind the ND. NO difference in sharpness, ZERO. You wouldn't be able to tell the difference between the 3 , even at 100% zoom and beyond. I tested it on Modern AI lenses, and Vintage Nikkor S and H lenses with single coatings all tested with the same result. No color cast either. I went out with the Haida ND and the Nikon Polarizer and shot outside, long exposure with foliage and water. Same result. Sharp sharp sharp. All on a D810 in Bulb/Mirror up. Haida has just won a customer for life.

Very thin and high quality construction. Image sharpness was not affected on my Sony a7riii and 100-400 GM. No color cast whatsoever. I took pictures of my Xrite Color Checker with and without the filter, and there is no visible difference between the 2 profiles.

I did a lot of research before deciding on Haida's filter set. The Haida filters are top quality at a slightly affordable price. I would highly recommend the Haida filter to other users.

I have used the filter only twice so far. First time was an image of a fast-running river. Filter worked well to smooth out the water. However, with a wide aperture there was corner vignetting. I was a little disappointed. Next, I tested the filter in my backyard using 16-35mm and a 24-70mm lenses. When wide open, the filter produced some corner vignetting with both lenses. In the mid to long range of the lenses, there was no vignetting. I will need to keep this in mind when using the filter so I don't have to crop off desired parts of the image.