So the thing I like about this most, design wise, is just how easily I can use it, I don’t have to faff about screwing things on, or lining things up, it’s just quick, simple, clip over, and I’m off shooting photos.
I think the difference goes from “there but not obvious”, to, “noticeably there(because I know the filters there)”, and I don’t mean other people would know I’ve used a filter, but they definitely notice the difference in shots.
The quality feels good to me, the “clip” has decent retention, and feels strong enough that it won’t slip or fall off, but also, it feels strong enough that it won’t become looser and looser after “however many” clip on, clip off, cycles, so that’s a good thing.
All in all, I think this is a great way to switch up shots and get that deeper pic, very happy with it.

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.

Darkening filter lens with clip to attach it to the iPhone (works on all models).
The lens can be unscrewed, it has a 52mm thread and can also be inserted on some Canons.
Useful in case of direct exposure to the sun, otherwise the iPhone will be able to adjust the brightness independently without any problem. I really like the effect that is created when you overcome the darkness of the lens, creating these blue-purple edges.
If you also own a reflex it becomes a valid purchase also in economic terms.

Here is a neutral density filter that can vary from 2 to 400, which is a very nice range.
It is mounted on a clamp that is the thickness of a smartphone.
It has a diameter of 52 MM, so it is wide enough to cover most lenses, smartphones and not just iPhones.
This filter holder is screwed onto the clamp, which means that it can be perfectly removed and installed on a camera with a 52 mm lens.
As a result, you can also imagine adapting any 52 mm filter. For example, a polarizing filter on this clamp.
Well seen.
A cleaning cloth is also supplied with it, which is always good to have on hand.

K&F Concept are producing some quality ND filter, especially this variable ND filter which has a 2 to 400 stops. There are clearly marked stops on the filter itself, however these are not hard stops which means you can go past the limits to produce "unwanted" effects like purple hazing and hues. At this point there is some X light leaking, but if you do not go past the marked stops there is no issue. This is primarily made as a clip on filter for mobile phones, but there's nothing to stop you from removing the filter from the clip and putting it on a 52mm lens.

The image quality looks clear and and colour clarity looks good, even towards the edges. However, you'll need to put your phone's camera in manual mode for this be just effective, especially on very bright days.

I would've liked a carry pouch or ND filter lid, however for this price and quality this is good value for money.

nice indicator so you know what level it is (min to max)
+ well thought design
+ easy to use
+ changes photos/videos a bit
+ slim, small and light
+ can be used with an iPhone in the case (but it's better to use it without a case on an iPhone)
+ microfiber cloth in the bundle, so you can clean it every time

- part of it stays on the screen and it may be a bit annoying

I was excited to try this variable ND from K&F Concepts as they make fantastic products

This one comes in a plastic case with a little cleaning wipe (nice touch K&F Concepts).

Taking it out of the case it’s a second to clip onto your phone and then a short time just to make sure you have it right over the camera lens correctly (which is easy, just move it around) so that you don’t get any of the filter edges showing

Once in place you just turn the filter until your chosen effect is reached

For me it’s easy : on a bright sunny day just set your phone video setting to 24fps and shutter speed to 48 or 50 and then put the filter on, turn to max and then just turn it until your video image looks perfect - a two second job and perfect results every time

The fact that the filter has a 52mm thread is amazing as it means I can take it off the clip and put it onto my mirrorless camera lenses too! So I can use this on my phone AND my big camera

Great results, easy peasy to use, and real value for money as you can use it on all your cameras!

Love it

52mm Clip-on ND2-400 Phone Camera Lens Filter, K&F Concept ND Filter Compatible with iPhone 15 14 13 12 11 Smart Phones

This product comes inside a cardboard box; inside the box, you'll find the ND2-400 Phone lens attached to a clamp clip and a wipe (inside of that orange bag) - you can detach this lens and attach it to any compatible 52mm lens (and attach any compatible lens you already own to the holder) which I think is a fantastic design. as off reviewing, this product costs £22.49; this price is very reasonable, especially for a budget photographer.

There's a ring that allows you to change the amount of light that gets in (to make it darker or lighter), and this is good, especially for mobiles, to change the light/darkness in your photos instead of using an editor.

The product is built very well, the glass is high quality and can be used on more than just the holder it comes with (other 52mm camera lenses)

definitely recommend this product

I like the size of this one, and K&F has good quality filters(depending on the tier they can be really good or ok). that I also use for my cameras. I have the Tamron Sony lenses and they use 67mm so it's nice and fit nicely with those along with others. This is perfect because I use this in conjuction with a step up ring on my phone with this phone clip for my filter sets and I can get some awesome filter fx. I have some gradient and ND filters. I've also used one of my variable NDs 67mm on the phone with it. Another way to have fun with photography without all the gear.

This is really nice and clips on with ease.