This little infrared viewer works great. It is on par with a smart phone camera, with the added benefit of infrared for low-light/no light situations. It has a camera resolution of 12mp and video of 1080p. The manual focusing lens is very easy to adjust and helps produce sharp images. Its 8x zoom function is not especially powerful, but thanks to its sharper focus I can live with that; these aren't binoculars or professional grade cameras after all. The viewer screen color change to green or purple is a quaint feature but not one I'm likely to use any time soon. This viewer is substantially smaller than my older one, and even if it can't zoom in as far as the older one, its resolution is better and its focus is sharper.

If you bought this for the headband/helmet mount, you are going to be disappointed. It has a limited field of vision and what you are looking at may seem very close but is in actuality about 3 feet away from you. Strapping these on and trying to walk around and use them as your primary vision source is just asking for an accident. It's also poorly balanced, forward heavy, and the viewer is only held onto its mount by a single screw. I would never use them like this. That being said, the included padded strap hooks easily onto the viewer via lobster claws and is fairly comfortable.

Lastly, the viewer comes with a charging cord, cleaning pad, a 32gb micro SD card, and a card reader/writer with USB-C and USB-A connectors. The USB-C charging port and SD card slot are located under a rubber cover on the underside of the viewer.

I'm overall impressed with this viewer. It's definitely a step up from my older viewer. So long as you know what you are getting into, you shouldn't be disappointed.

This is really great. Although I wish they had a battery source for both lights. The frame seems a bit light, I think if it were a bit heavier it would give the feel of a high end digital microscope. I agree, it's not like I'm going to throw this around like a football.

Scope works very well and has good light source. Very happy so far.

The K&F Concept KF50.0009AEU is an outdoor security camera with full control over a wireless connection. It is powered by an internal lithium battery that can be charged with the included solar panel. The lens mount is motorized, allowing remote control of horizontal and vertical movements, as well as zooming in and out. The integrated power source offers a degree of independence when choosing the location of the camera. I placed our sample on a post in the yard, quite high up, and pointed at the lawn to record wildlife, especially at night. The plastic bracket is simply attached with the supplied screws. Masonry requires the use of a drill and dowels (preferably better ones than the cheap examples in the kit). I similarly mounted the solar panel under the camera, using the swivel mount to set it pointing slightly up to harvest as much sunlight as possible. It could be placed away from the camera. The 3-meter line offers a lot of flexibility in this regard. It connects to a USB-C socket underneath the device. An alternative power source could potentially be used when sunlight is scarce but the body of the plug is a bit too small and the socket is rubber encased to keep moisture out so a suitable cord is needed. It's pretty normal for this type of device. I would have liked to use the camera via PC, but it doesn't support Windows. The only way is to using the android app in an emulator or maybe using a windows program with multiple factory cameras. This requires some knowledge and effort, and the camera may need to be set up in the manufacturer's app first to get the necessary details. The camera can be set up with either a sound signal or a QR code. I had trouble with the former, but the QR code worked right away. The textbook clearly took some effort, but some of the English language is hard to follow. The camera has all the typical features that appear in the list. The app is fairly easy to navigate, but not perfect. Recordings can be viewed after a short connection delay. They can be stored on an SD card in the camera or in the cloud (requires subscription after free trial). The recording quality is very satisfactory and I found this camera generally capable. I'm still trying to line up shots longer than a few seconds and the battery doesn't last the night at this time of year. It could be better in a security setting where it doesn't trigger and isn't accessed as frequently.

The filter is really good, it seems to be a real 10 stop filter (some ND1000 are only 8-9 stops, which makes shutterspeed calculations hard), it is reducing light in both Visible and Infrared light (has been tested on a full spectrum camera used for Infrared Photography), so you will not have a nasty discolouration in the sky as with other ND filters, but you will get a slight blue colour cast, nothing that can not be fixed in post process with the white balance tool, but I highly recommend doing a white balance setting with the filter on to get accurate colours, especially if you are shooting in JPG. I did not see any reduction in detail (see the 100% or 1:1 crop). It easily screwed on my lens and step up rings as well. It has a nice grippy area which I find giving a much better grip than other filters. One thing I'd like to mention is the case it's coming with has a nice locking mechanism and also two carve outs to be able to easily remove the filter from it's case, actually it's one of the best cases I've seen, beating the nice metallic cases from Gobe, which does not close well with larger filters.
If colour cast is a critical issue for you then this filter might disappoint you with it's blue cast, in that case I recommend Haida's NanoPRO ND1000, which I unfortantely lost, but that has virtually no colour cast at all, but nearly triple the price.

The filter quality seems to be perfect. I'm used to that from K&F Concept. And you get a really nice blue streak effect. The problem, however, is that you get that with every single light source in your image, so you don't really have the ability to be selective. You have to compose your recording really carefully. The filter rotates smoothly, allowing you to change the direction of the stripes, but you'll still see them in any light source. I think in the end Photoshop is probably the better option to give you more control over such effects. Still, it's a worthwhile tool to have in your toolbox, especially given the cheap price for an FX filter. It uses the same high quality optical glass as the other newer filters. The precision machining of the filter threads and ring is impressive and gives the feel of a much more expensive filter. So I can't fault any of the properties of the filter. It's just for the way I shoot, it probably won't be as useful as for some other types of photography.

This light is incredibly bright. I even use it in my bedroom as the only light source and I’m not disappointed.

I tried the 46mm diameter filter on a Nikon Z30 with a Nikkor 16-50mm lens. The filter fits perfectly into the filter thread of the lens.
When held against the light, the coating of the filter glass becomes visible. A green shimmer can be seen, which indicates an anti-reflective coating. The glass itself was delivered in perfect condition.
I did not notice a reduction in light intensity through the filter. With the same exposure time, aperture and light amplification, I could not see any difference in the brightness of the image.
Well, how does the filter work, or rather, where is the best place to use it?
When photographing or filming direct light, such as light tubes or LED bars, the light is scattered by the filter in such a way that it looks like fog around the light source. The areas around the light source become more diffuse and the light source itself becomes very blurry. For the best effect, as much light source as possible should be visible in the picture. Objects in front of the light source are only slightly distorted by the filter.
The first test shots convinced me of this filter and I am totally enthusiastic. It's definitely an asset to my recordings.