It does what it claims to do, as a Neutral Density filter to provide gradient density, without adding color, hence the 'neutral'. I had tried other ND filters, and while to an extent they were fine, they did in fact add an undertone color.In that sense, this filter is showing its quality, proving its value as a nearly $150 filter.

This is a pro-level filter. It has no color cast and does a great job. I'm using it for all my outdoor filming needs and love it.

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As of this review, the Cinema VND FX Filter from PRISM LENS FX is priced at approximately $150. It’s been a fantastic addition to my video gear. The filter provides a smooth, neutral density with consistently reliable results. It features various ND stops and, so far, I haven’t encountered the “X mark” that can appear with other variable filters. Given its price, it offers outstanding value and has quickly become an essential tool in my kit.

The "Cinema VND FX Filter for Camera Lens Diameters of 77mm by Prism Lens" is a well built variable neutral density (VND) filter for 77mm lenses. It screws smoothly onto the 77mm lens and the variable filter movement glides smoothly across its 5 stops. Unlike other less well designed filters there are hard stops at both the minimal and maximal settings thereby preventing overtwisting which can introduce aberrations into your pictures. The filter is well machined out of heavy type metal giving it a solid feeling that it will last through repetetive use. The blue color to the outer ring doesn't do anything with regard to the efficacy of the filter but it does lend a cool look when attached to your lens.While there isn't anything to complain about with the lens itself the fact that the lens is housed in a plastic case instead of the pictured felt case just seems like misleading advertising which always bothers me. Although there are positive aspects to square plastic cases for storing filters it would have been more honest for the seller to have also provided the case that is advertised or not to have not shown the felt case at all. Nonetheless I think that the filter itself is a solid 4 star item from which I am reluctantly deducting 1/2 star because of the high price of the filter contrasted to the cheap plastic case. The total rating, therefore, is as a soft 4 star product.(Please see below for my rating criteria):=============================================================Disclosure:As noted by Amazon, I am part of the Vine Program which means that I acquire products at no cost in return for a truthful rating. However, although Vine Members pay nothing up front to get these free products they are considered by the Internal Revenue Service as taxable income at the full retail price at the time we get them and we, therefore, must pay taxes on these items.On a more personal note I often read reviews for products I am considering buying and rely on those reviews that are detailed and come off as honest and full reviews on the product. I therefore try my best to give a true and honest review based on my own experiences with the product.My Rating Scale:1 star. This is the absolute lowest I can go and is a definite recommendation against being purchased.2 stars. Less than average - having issues that I try to delineate in my review. I personally would not pay for this item.3 stars. Average - neither great nor terrible. It will do the job it is supposed to do but without any obvious good or bad issues.I might or might not buy this item depending on the severity of my need or want.4 stars. While the product is better than average it is not an excellent product. I would probably buy this product.5 stars. Enough above average that it exceeds my expectations of how the product would and should perform. A product getting this rating is highly recommended.Further middle ratings: The above explanation is the base of the recommendations I give in a review. Some ratings are further rated as soft (1/2 star below), solid (the star rating given) or strong (1/2 star above)

The Prism Lens FX Store Cinema VND Filter is, for all intents and purposes, and if you’re considering a variable ND filter you know what those are, a professional quality variable neutral density filter. I consider it a medium cost, even a lower cost budget filter, within the spectrum of professional cinema ND filters. Consider that a single density Lee Proglass filter will cost upward of $300 each, so covering a 5-stop range will run around $1500. However, if you’re shooting professionally, these expenses are tax deductions, or at least amortizable.The Prism Lens FX Store Cinema VND Filter gradations are marked in the more traditional, and more common amongst professional users, of 3/10 markings for each stop of density. So, for example, an ND of 1-1/3 stops would be represented by the designation 0.4, or two stops as 0.6, and so on. In the case of the Prism Lens FX VND there are the delineations 0.3. 0.6. 0.9, 1.2 and 1.5, representing its 5-stop range. There is also plenty of usable range between each stop to estimate 1/3-stops (0.1) if that amount of precision is needed. These days, with digital video, I’m looking for a camera setting, not a specific, numerical reduction in transmission, so I set the ISO and shutter speed (angle), then rotate the filter until the amount of light entering the lens gives the preset exposure.I was pleasantly surprised to find that the glass of the VND is coated, despite noting in the description that it wasn’t; this seemed dubious anyway since uncoated optical glass is rare these days. As far as the seller’s assertion that there is no color shift, if there is, it’s not particularly noticeable. Unless it’s so far of the chart as to be considered a flaw, color shift is not something I normally concern myself with anyway; I do a custom color balance to a preferred standard prior to all shoots for consistency. As far as sharpness is concerned, the optical transmission appears to be near fidelity; I haven’t made comparisons to more expensive filters.Besides the range of a VND filters design performance, extending that range is no more difficult than combining it with another, single density ND filter; the Prism Lens FX Store Cinema VND Filter makes this convenient by providing 82mm threads on its outer ring. For example, in the pictures I’ve provided, I show a 1.5 (5-stop) ND filter screwed in to the front of the Cinema VND, effectively extending its range from 1 – 5 stops to 6 – 10 stops. In another picture I show a 0.9 (3-stop) rectangular glass ND inserted into a matt box in front of the Cinema FX VND Filter, extending its range from 1 – 5 stops to 4 – 8 stops. By this means a user can choose the most useful range of exposures for a given situation and also eliminate the need for another or more filters. This to me, is the main advantage of a VND filter.I have no issues with the lens itself, but one with the seller. The lens is shown on its Amazon PoP page with a branded soft case, implying that it comes with that. As it happens, I prefer soft cases. In realty, the filter arrives in an inexpensive (cheap) plastic case with no other retail packaging; every bit of expense was spared in packaging. The implied soft case is certainly a higher quality option than the plastic case received. So, here’s my message to the seller: don’t make implications you have no intention of making good on. Underwhelming your buyers probably isn’t the best way to get return business. It’s left a sour taste in my mouth and reduced my rating of your filter from 5-stars to 3.