I have used ND grad filters for years on my SLR and DSLR cameras. I love scenery photography as opposed to portrait so always looking to sort out the difference in the light between the horizon etc. I live near the sea les that 300m away and walk along the cliffs regularly and don't take my DSLR with me when walking the dogs but always have my iPhone so any unexpected scenes are normally captured using the iPhone. This ND grad filter will come in useful. It fits over the lenses of my iPhone and helps sort out the difference in the light. Once clipped on it is easy to rotate the bezel to the setting you want using your finger. You have to ensure that you do not go past each of the stops or you will get leakage. SO my advise is to check before shooting that you are at the required stop. The other great thing about this filter is that it unscrews from the clip holder and can be screwed onto my 52mm lenses..Bonus... All in all this is a great little filter that I will carry around with me when out walking the dogs. We have a dog walking bag which has Poo Bags and drinking water etc so it sits in the side pocket of the bag in its case. so it is always there if we get a lovely sunset or something really nice to photograph on the sea or beach.. Get little gadget well worth the money highly recommended... As soon as we get anything really nice I will update this with the images...

This ND filter was developed specifically for the iPhone. This should be taken into account, otherwise the verdict will probably not be so favorable. The special thing about it is that this ND filter with its filter ring completely encloses the camera module of the newer iPhones. The actual filter then lies directly on the lenses and sits really well.

Unfortunately, this doesn't work with a cell phone case that has a camera protector. Then the camera module becomes too big and the filter no longer fits over it.

The whole thing is held in place with a fairly tight clamp, which of course then covers part of the display. But in my opinion that's not particularly important.

The filter can be adjusted from filter strength ND2 to ND400 by simply turning it. The whole thing is done with a quarter turn, so all levels are pretty close together, so you should turn slowly. There is a 10-level division on the ring, but it can still be adjusted continuously. The filter does not always have the same effect on all three lenses. With the ultra-wide angle of the iPhone 14pro, for example, you can get the filter ring in the picture with some settings. In some settings you notice a slightly stronger vignetting. You have to try it out a bit, but you can get the hang of it quickly.

Who needs something like that? Certainly no one who doesn't know straight away what an ND filter does. The product is aimed more at photographers who want to get even more out of the iPhone and, especially in bright light, still want to use long shutter speeds. To do this, you would have to delve a little deeper into the subject. There are numerous, very good YouTube videos on the subject...

I think it's really great that the filter holder or clamp with a 52mm thread can also accommodate other filters. A polarizing filter or graduated filter would be exciting here for different effects.

In any case, I am very happy with this ND filter, even if I probably won't use it that often. I tend to take the photos or videos that can be produced with it with a system camera. But if you're travelling light or want to experiment with iPhone photography, this is the right choice. The price is unbeatable for this great quality.

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.

I tried using the variable ND filters on the DJI Osmo Pocket 3, but found them too fidly. Instead I went for this 4 filter kit which works great. AND BONUS: You can stack these filters on top of each other! You can even stack the polarizer on top of the ND filters. PLUS the other thing I like about the K&F concept filters is, they have little indents on the side that you can get your fingernails into to place the filters on the lens and it also makes it easier to remove the filters as well. I tried the other brands, which are good, but they don't have these little finger nail indents. PLUS the camera can rotate the lens to the closed position with the filter on (However, it will not close with stacked filters on—>just one filter on)

Great camera and Bluetooth system

The smartphone lens filter from the K&F Concept brand impresses with its excellent workmanship and quality. The variable ND filter, which is easily and securely clipped onto the iPhone lens using a clip, is particularly impressive. This innovative approach makes it possible to use the advantages of a professional ND filter on the iPhone as well.

The filter is extremely easy and intuitive to use. The clip holds the filter firmly in place without slipping, which enables uncomplicated and quick installation. This is particularly practical when you are on the move and need to react quickly to changing lighting conditions.

Another plus point is the photo quality, which is not affected by using the filter. The images remain clear and sharp and the effects of the variable ND filter are well presented without color distortions or other unwanted artifacts. This makes the filter ideal for anyone who wants to take high-quality photos with their smartphone.

Overall, the filter offers an excellent way to improve the flexibility and quality of smartphone photography. It is easy to use, well made and ensures that the photo quality always remains at a high level. A clear recommendation for all smartphone photographers who want to expand their creative possibilities.

Works great, it is compact and sturdy and has a ton of great features. Plus the pink is very pretty.

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,