[Solid ND] I have tested this filter three times now in daylight and artificial light and am very satisfied; it's earned a place in my kit. Density was perhaps a quarter stop less than 10 stops. The color is extremely accurate, varying from my no filter control shot by about 50 degrees K cooler and (in Capture One) 2.5 greener. These are extremely small adjustments. My 10 stop B+W gives a very strong red-warm cast that is hard to eliminate completely with a grey balance, a color cross-over likely due to infrared leaking through the filter. Sharpness: using a Nikon D850, 20mm f/1.8 lens, tripod, mirror up, electronic front curtain shutter, f/8, default settings in C1, at 100% view onscreen the Haida is indistinguishable in the center from No Filter, and at the edges shows only a tiny resolution loss (typical of any filter). You have to go to 200% and compare side by side to see the subtle differences. With a longer focal length lens, I expect any differences to be even smaller. My verdict: excellent filter at a good price. I plan to buy a second in a different size and see no reason to search other brands.

[Solid ND] I have had the Lee Filters NDs for several years, and after trying Haida's 6 and 10 stop filters I will not go back. The Haida ND filters have a more natural color balance then the Lee. I had purchased their filter holder system as well but I didn't like it and kept my Lee holder system. This filter does work in the Lee holder though it does fits very tightly, not necessarily a bad thing as it is light tight. I am very pleased with these filters!

[Solid ND] Excellent materials of construction, a high quality glass, compared to other higher cost filters, has a very exact control of color casts. For the price and quality it has, I recommend it is worth it.

[Solid ND] I own the Lee Filters 'Big Stopper 3.0 ND filter (10 stop) and have used it quite often. After seeing the reviews on this filter, I thought I would try it against the Lee system. This filter produces more natural and warmer colors than the Lee, the contrast seems to look a little better. Haida's M10 filter system doesn't leave a lot to be desired though but their ND filters are definitely worth the investment!!! This filter will work in the Lee holder,as it comes with a layer of foam that can be applied to keep light from bleeding past. I am very pleased with the results and would highly recommend this filter for anyone who wants to do long exposure photography.

[Glass] Inexpensive. Dead-on 10 stops (based on some fairly limited testing). Throws a little yellow-orange-brown ish color cast, but it is fairly uniform making it manageable and correctable.

[Glass] Just what I needed for sunset's over the ocean.

[Glass] Purchased the 6 and 10 stop versions to pair with the Kase K9 holder. Both of these filters create superb results with no loss in sharpness and no color cast whatsoever. Made the switch from a screw-on variable density that always caused problems under bright and side lighting conditions. These allow very accurate control of exposure to create blurred water / clouds. Easy to clean and sheds water well. Great value.

[Glass] I've been using my new Hasselblad X1D II for about six months, and needed to improve the prospects of sky effects, as Scott Kelby discusses in his classes. This filter provides that capability for the XCD lenses

[Glass] Llevo casi un año usando filtros Haida y no pienso cambiar de marca, este en especial proporciona una gran calidad de imagen con mínimas aberraciones cromáticas que se resuelven sin problemas desde cualquier editor de RAW. La densidad que maneja de 10 paradas te permite tomar fotos en plenitud del día con exposiciones tan largas que superan el minuto.

[Glass] Great filter at a reasonable price.