I love that this lens gives the best wide angle and the Marco can be a serious competitor but I will say that the attachment thread is rather big. It is not universal for iPhone case that have built in threads for lens. Also, If you are using a gimbal make sure to use a counter weight because it is a heavy lens but other than that it works great for the price it compete with some of the best phone lens.

I bought a set for my RF 28-70mm lens which has 95mm size filter threads. I like to shoot while wearing tactical pants (better than cargo pants) and will swap or stack filters in and out easily with side pockets. Not as fast as internal ND but fast enough. These are better than using a variable ND because it doesn’t interfere with the circular polarizer. I exploded it my pants. So good. SOOOOOO GOOOOOD. Really.

It's great with smartphones, I use it with a variable and filter and it's ok. Clamp is strong. It uses 37mm threads so I tried it on my old Canon vixia, ruins the image. Though if you take the wide angle without the macro portion the image is quite nice. But you can't zoom and af is pretty much gone. So don't use it for camcorders, clearly it's just for fixed lens.

This filter works as advertised and is built rather well for its price. The threads are smooth and the ring rotates with a nice dampened feel. This filter allows me to dial in the exact exposure I want in bright lighting (such as the sun) while maintaining a wide aperture and a 180 degree shutter.Unfortunately, the glass (maybe plastic?) used in this filter is of very low optical quality. Even with most kit lenses, there will be a noticeable decrease in sharpness. Using a more expensive lens becomes pointless when this filter is attached to the front of it. Although at this price, this should be expected.This filter also creates a textured bokeh, which renders the gorgeous bokeh that my lenses produce into a gritty and distracting background. Since the whole point of using a ND filter is to shoot wide open and achieve a shallow depth of field, this filter is rendered useless in my opinion.The price of this filter is great, but due to the big decrease in sharpness and the way it destroys bokeh, I decided to move on to a much more expensive filter.So if you're looking for a cheap variable ND filter and don't mind the decrease in sharpness and bokeh quality (which is probably less noticeable in video) then this filter will work for you, otherwise, look elsewhere.

Out of the box this filter is well made, threads on and adjusts smoothly. The optics are quality and I was pleased with the photos. I did experience some vignetting when pushed to the limits, but that might have been caused with me having the UV filter still attached and like I said that was at the very extreme end of the filter position. Very impressed with the filter and it's quality. The photos were F8, ISO 100 and 1/160,1/25 and 1.6 sec. Would buy again.

I feel that this filter and riches the green and blue and white colors in photos. Here are a few shots using the filter, I don’t have much in the way of comparison with or without but it does help especially with reflection over water or on a window. The ring is metal, the glass is made of glass however the threads are plastic, my only disappointment but for the price, I’m not complaining

In my experience Tiffen makes a very good filter and this one is no exception. Threads match nicely and the filter seats firmly yet is easily removed. The rotation of the filter is buttery smooth and stays put. The Tiffen adds a nice degree of polarization that gives colors a bit more saturation and contrast with a minor loss of overall transmission. If you're not shooting with a polarizing filter you probably don't realize just how much stray/reflected light is affecting your photo's. Once you see the difference a good filter like this can make you'll wonder why you didn't start using one sooner. Put your UV filter back in the bag and put something in front of your lens that will actually improve every shot. I've spent bigger money on other brands of filter (Hoya, B&W, et al) and I just don't see that money buying me a better filter. Maybe I'm missing something but, "the proof of the pudding is in the eating" and Tiffen filters do the job for me without breaking my budget.

Works well with minimal color cast. Definitely slim; my canon lens cover snaps on pretty well most of the time but def need to be careful about it falling off. A quick quarter-turn or so tightens it in place pretty securely.The one bad thing is that there's a lot of play in the threads both when screwing it onto the lens and when screwing other filters onto it in a stack. Pretty easy to cross-thread... just need to be careful.Overall a good value, especially since Amazon's stock of the equivalent B+W filter seems to be mostly used items sold as new :(