NEEWER 2 stuks ND0.9/1.8 (3/6 stops) vierkante ND-filter, 4 x 5,65 inch neutral-density-filter Cinema 30 Multi Nano-coating voor Neewer Matte Box, compatibel met SmallRig

UPDATE:Seller was very responsive and issued a refund for the used item.ORIGINAL REVIEW:Purchased new and order was fulfilled by RUIHOTOR. Received a used, open box product. Someone had written on the cards, cleaning clothes were open and had been used. Glass looks generally okay minus some cleaning marks. Clearly someone used them for a shoot and then returned them to avoid renting or paying for the product.

These are very neat and well made, so much cheaper than the Tiffen ones which do the same thing. Save your money and get these

Real glass! Absolutely safe for delivery, has a excellent quality case

The presentation and price of these filters are amazing.

At about 4mm thick, with their measurements of 4” x 5.65”, the Neweer 0.9 (3-stop) and 1.9 (6-stop) ND Cinema Filters are a pretty hefty chunk of glass, and those coatings, on both sides, a beautiful thing to behold. I own a number of other Neewer photo/video accessories; I consider them a trusted manufacturer. In fact, their line has become more and more oriented toward the professional user.There are a couple of ways to state the light reduction for a ND filter, one is filter factor and the other is Optical Density, the system being used by Neweer. Optical density is delineated in tenths, with each tenth of reduction equal to a third of a stop; therefore, each full stop of density reduction is three tenths, or 0.3. A 0.9 ND filter is used to reduce transmitted light by 3-stops, and a 1.8 (1.8 ÷ .3 = 6) ND filter by 6-stops, allowing the user more options and better control of exposure in brightly lit environments. And of course, the two filters added together result in a 9-stop (2.7) reduction in transmittance.As the Neweer asserts, their Cinema Filters are sized for Tilta and Smallrig mini matt boxes, although they fit the filter holders in my K&F Concept matt box perfectly; the 4” x 5.65” size is fairly standard among mini size matt boxes. If you’re not familiar, a matt box fits onto the front of a lens, basically serving two purposes, as a filter holder and a lens shade. In the case of the K&F Concept matt box I use, it is supplied with filter holders that accommodate the 4” x 5.65” cinema filter size.Handling the filters takes some care, since once out of its case it isn’t held in anything, for example a frame, but is all glass from edge to edge. In our case, we keep cotton gloves around for such situations, and use them when handling these types of filters. Conveniently, Neewer provides a microfiber cloth for handling and cleaning the filters.The filters arrive in retail packaging, and are supplied with professional quality fleece lined nylon storage pouches with a magnetic closure. Conveniently, sitting under laminate, each case is labelled for a quick visual confirmation of the enclosed filter, a nice touch in my opinion, especially when they’re sitting in a case with a number of other filters.I ran a couple of tests on each of the filter, one to check its exposure accuracy and another to check whether they diminish the sharpness of the transmitted image.For the exposure tests, I simply calculated the exposure with the ND filter applied, and made the exposure. I then removed the filter, closed down 3-stops in the case of the ND 0.9 filter, and 6-stops for the ND 1.8 filter, and made another exposure. I found the seller’s stated filter factors to be accurate; both exposures were recorded with the histogram in the same range.For the sharpness test, I used the same two images, pictures of small typeface, with and without the filter, and enlarged them 500%. I didn’t find a noticeable reduction in sharpness, but a more precise test would need to be done with a lens test chart, and I don’t have one of those. But visual results are typically all I need.The physical quality of the Neweer ND Cinema Filters, and their coatings, along with the provided case, are outstanding. The filter factors are accurate as far as my testing determined. If there is any reduction in sharpness it wasn’t evident in my visual testing. That said, even if there is, it may not be an issue in practice, since, in my opinion, modern digital video capture is overly sharp and unemotional anyway.Given the quality of the Neweer filters, and the cost, in my opinion, they’re a value. Consider that these same two filters from Lee (a leading cinema industry filter supplier), a 0.9 and a 1.8 ND, would cost you $666.00.