Very good filter system with the most common filters you need. I use this on an iPhone 15 Pro Max using a filter holder for taking pictures and filming. Thanks to the excellent magnetic adhesion, the filters sit firmly on the holder, but are still easy to change in seconds. The image quality is not negatively affected by the filters and is fantastic overall. The price-performance ratio, especially in the set, is great.

This is the best ND solution I have found. I am using an iPhone 11. The filter attaches easily and the clip is firm. The filter is so easy to adjust and I cannot fault its operation.

They sent me a new version of the filter that doesn't have the x vignette and works much better!

Not sure what I expected getting this filter but it definitely has an X vignette. I used it on the iPhone 15pro max and the .5 lens especially is noticeable. Good news is it kind of works for a vintage / low-fi look. The promist aspect of it is great though.

This "K&F Concept 77mm True Color Variable Fader" is quite a well designed and constructed filter. It is a "twofer" in so far as it combines both a Neutral Density (ND) and a Circular Polarizing (CPL) filters into one easy to use screw-on device. The build quality is impressive, as have been the majority of K&F filters I've ordered over the last two year. Further, the filter comes packed in a leather case with a pull-out tab to slide the filter out for use.

If forced to find a fault it would only be that I wished the filter went further in its light reducing abillities. Having said that about its ND2 to 32 range, I must also heap praise on the filter for the orange finger putters which allow you to move the filter in gradual amounts instead of only being able to set the filter on full stops. Thus the combination of the CPL function (which cuts out reflections from water or stray light from unwanted directions) together with the ND function (which diminishes the amount of light entering onto the camera's sensor thereby allowing longer exposures) provides the ability to get smooth shots of such things as moving water without suffereing any glare from reflections.

The K&F brand of filters, as a whole and specifically this "K&F Concept 77mm True Color Variable Fader," are well made photographic filters that are true to size and perform their intended effect well. Comparing this filter to similar filters from other makers leaves me with the definite thought that for the cost, fit and effect the K&F filters perform quite well. This filter, specifically, is an impressive filter at a reasonable price and I think it is, if not a spectacular build, definitively better than the average. As such I think that the "K&F Concept 77mm True Color Variable Fader" is unquestionably a strong 4 star product which deserves a place at or near the top of anyone's comparison shopping list.

(Please see below for my rating criteria):

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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)

Great little filter made specifically for Cinematic effect.
I'm a professional photographer. I had written a rather lengthy 5 star review, but it was rejected for reasons I am not aware of. I recommend this filter if you are looking to soften the visual impact of your photos and video.

The filter has the size of 10x10cm, weighs 47.5 gr and is 2mm thick, so it matches the filter holder from the same company. Made of anti-reflective glass, it allows to eliminate the noise caused by artificial lights (that is, the yellow part that appears below in the photos of the Milky Way, due to the city's artificial lights). The difference without the filter is noticeable, although a good post-production process will keep the artificial light while the filter is fully cut. With long exposures for the Milky Way, the amount of light captured by the sensor decreases slightly, but the raw power is rich in information and makes it possible to recover the Milky Way and the whole starry sky. It's possible to overcome this (i.e. capture more light) by using a tracker star or taking multiple shots (in my case, without a tracker star, with an f2.8 to 11mm, the max time to not getting the movement of stars is 30seconds). Even in the city it does its job eliminating that yellowish gradient in the sky and bringing out the beauty of the night lights.

This is exactly what I needed. I was expanding my iPhone video rig setup and encountered the problem that all newer iPhones have with excessive image and video sharpening. This filter is very, very mild, but just strong enough to reduce that sharpness. I mounted it on the Moment Universal Filter Mount Adapter, with an ND filter, also from K&F, and use a third-party app to control the shutter speed and white balance, which helps add a bit of motion blur and a more natural depth of field than the cinematic mode in the native camera app. This filter will pretty much live on my iPhone while filming. Works particularly well with this ND filter,

I love this thing. For a while now my wife has been claiming that her late model iPhone makes my camera redundant, what with all its magical camera trickery that can make any photo pop, but it's stuff like this that proves her wrong. We've just spent a week on Koh Samui visiting waterfalls in bright sunlight, and the results I got from this 10 stop ND filter were astounding. My long exposures blow all of her shots out of the water.

The filter is nicely presented and feels high quality. I've not noticed any distortions or odd colour casts. This is just a great filter.