Fits a 77mm lens filter thread with no problems. Coated optics. Seems not to cause vignetting or degrade image quality at all. Very happy. Can stack another 77mm filter on just fine as well so no issues with front thread either.

This is my second ND1000 filter from GOBE, now I bought a 77mm for my tokina 11-16mm lens I am a landscape photographer, The experience with GOBE products is great the filter was build with high quality and is easy to attach to the lens. The filter came with a metal housing for protection. Great choice.

I ordered this 77mm Variable ND (along with the 77mm CPL) from Amazon US, shipped to Japan where I live, & got it in 10 days, which is faster than average. The company is great with communication regarding tracking your package, & it arrived neatly packaged & in perfect condition. I've only had a chance to take it out once, so I'll update this review if anything changes, but here are my thoughts so far:PROS: Easy to attach / remove (the CPL is a bit harder to take off), nice, even tones, does what it's supposed to. The quality of the glass & the performance are great considering the cost. The construction feels solid.CONS: When used at darker settings you can start to get the X pattern (when the two pieces of overlapping glass in the filter don't line up perfectly they can create a kind of shadowy X in the middle of your shot.) This is pretty common among Variable ND filters, especially at wider angles with darker settings. I'm using it on a Canon 6D with a 24-70 L lens, & it was more noticeable in the 24-35mm range when set in or just before the "Max" setting. It's not totally unexpected from a variable filter, though, so I can't fault it too much. It kind of comes with the territory, so it's not really a problem.OVERALL: I recommend this lens if you're looking for a low cost, high quality Variable ND filter. The key word here is VARIABLE, meaning you're looking for convenience. If you want a filter that avoids the X pattern & maybe performs a bit more consistently, I'd recommend some regular ND filters, which can be stacked if needed. I'm considering buying the ND 1000 (from Gobe, I really like this company) but I still plan on getting a lot of use from this variable one. As an added bonus, Gobe plants 5 trees for each purchase, which makes me happy.

After reading many positive reviews ordered "Hoya 77mm HMC UV(c) Digital Slim Frame Multi-Coated Glass" Filter for my sigma 17-55mm f/2.8 lens. Its made in Philippines. I had also ordered "B+W 62mm Clear UV Haze with Multi-Resistant Coating (010M)" filter for other sigma (18-250mm) lens. B+W definitely felt more heavy/nicer built than this filter even though 77mm filter is larger. B+W cost lot more money :( Again this is simply based on just physical comparison not based on picture quality comparison. With this said, i am happy with this filter.

This is my first variable ND filter and Im very happy with it. I got the 77mm version because its a very common size and I already have three lenses that it could fit. Plus with adapters, I can get my smaller lenses to work as well.The filter. Overall its great. Metal construction with a very smooth ring.The stops are marked on the ring and the overall construction is very good.Again this is my first variable ND and so far I'm enjoying it very much.Price is affordable too.

I am using this 77mm filter to protect my wife's Nikon 24-120mm VR lens on her D750. The fit is perfect.The filter appears to be of high quality, and they even supply a cleaning cloth.

The threading of the filter for the lens cap or threaded hood is not 82mm. I just purchased an 82mm lens cap and hood only to find out it is too large. Looks more like it needs to be a 73mm to 75mm thread. The 72mm thread for my lens is correct, however, and works well.Update 11/4/2020: Ordered a 77mm to 82mm step up ring. The ring fits and means that this is a 77mm thread and not an 82mm thread for the cap and hood. If you buy this filter, you will need a hood and lens cap for a 77mm thread.

It really is a really fantastic Gobe NDX 77mm filter, when you take photos they are really very beautiful, even the very clear and beautiful color and contrast are very happy for this filter, excellent also fast and punctual seller.