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 Bluetooth module performs as well as a $200 one, with equivalent sound quality. It takes few seconds to connect, the mic quality is fantastic.

Awesome product!

If you're looking for a good all round inspection camera this is it....
I purchased this with specific task in mind:
1. Plumbing inspection and leak detection especially when the drain is clogged...
2. Automotive and light duty Truck repair - used it to do visual inspection inside cylinders on diesel engine valve, cylinder walls and piston.. I used it to locate hidden bolts while changing out cam driven distributor on 1994 Toyota Camry..
3. Home HVAC inspection on evaporator, condenser, and supply side air registers.

I am retired and no I am not a professional.. just like fixing things and the K&F Concept Inspection Camera is soooo much better than using an inspection mirror and a flash light....plus you don't have to climb over or under things to do inspections....My wife uses it to find things that she has dropped behind the washing machine, dryer or the stove...

I’m a home inspector and my inspection software works on my Samsung so it is very helpful to have the IR images on my phone also. It has simplifi d my inspection process.

Quality best inspection camera I ever own.

K&F Concept 3G/4G camera:
Fantastic picture during the day and at night with white LED or IR. In addition, the camera can actually do without an internet or power connection. Smooth operation when watching the videos. Detected movements are communicated via push.
The software still has room for improvement

So far I have been very satisfied with this 4G LTE Solar Camera. I placed this solar camera on the corner at the back of my house and positioned it about fence level as I didn't want to invade the privacy of the neighbors. In this position I can still pan the camera to view the entire back yard and around the corner to see my shed. Luckily I can point the solar panel south for maximum charge.

Setup was very easy. After downloading the Ubox APP from the Google Play Store, I turned on the camera and followed the instructions in the APP.

The operation of the camera within the APP is very good, I can pan the camera up/down and left/right, and the speed at which this happens can be adjusted. The picture quality can be adjusted between SD and HD, I only ever use HD.

Overall, this 7*24 hour 4G LTE Solar Security Camera works very well, has very good image quality, and because of its power source, it can be placed anywhere and, in my personal opinion, represents good value for the money.