simply to use, green light comes on when connected!

I use the 77mm filter on my Canon EOS 6D with a standard 24..105mm lens. He fits there perfectly.

In the test photos, there was no visible difference on the camera screen from photos without a filter. The effect only became apparent in the details on the big screen. Otherwise very bright areas are reduced in intensity by the filter and sharp edges are also softened a little, but without the kitschy effect of a soft focus. If you take a closer look, the entire image is somewhat darkened, as if by a very fine gray haze. The differences are almost imperceptible in normal ambient light, but are visible on the screen in dim light.

I like that the filter gives you more atmospheric pictures, especially in dark surroundings with light sources in the picture (e.g. candle, lamp, moonlight on water, etc.), without having to post-process them heavily on the PC afterwards. The halo around the light sources is visibly emphasized without appearing artificial.

This diffusion filter is certainly not intended for everyday photos, but rather for special moods. Of course you can still edit the pictures on the PC, but the filter does some of the work when you take the picture and - as I said - doesn't look so artificial. Therefore, amateur photographers who like to work with atmospheric light should at least take a look at the K&F diffusion filter.

Had seen some reviews on YouTube. When unpacked, it looked a bit cheap. But functionally better than I thought. The amazing quality with the 12Mpix camera and lens isn't too bad either. The construction is simple and feels cheap, but in my first picture it doesn't compromise the functionality and quality of the image on the screen. Haven't gotten the videos and photos on the PC yet. It also works with a rechargeable/mobile battery bank so nice and versatile and a mobile setup is possible.
The magnification with a sharp image is so good in terms of resolution in combination with the lighting that, in addition to electronics, it is also suitable for biological and photomedical applications such as viewing and enlarging the skin. That surprised me a bit. The camera and lens can also be removed from the stand and can therefore be carried on the move. The image is more stable under a stand than in the hand, but solutions to this can also be devised with some Macguy pens.
Software is basic but the instructions in the manual are easy to follow.
The wiring was designed to be a bit awkward, but I understand the reason and functionality behind it. I think this could have been partially integrated with fewer cable hassles and vulnerable ports. But from a simplistic cheap architectural side I understand the logic.
I sometimes find the light too white. A warm white color would also have been nice to see true colors. The white light is sometimes overexposed. The light is strong, but it can be adjusted and the microscope ranking is dimmable.
I find all kinds of settings icons on the screen very annoying. It distracts from the picture. I haven't found a settings function to turn this off.
Points for improvement:
Actually pretty good for the price.

1. Mobile crafting with fewer cords
2. Warm light option for true-to-life images.
3. More megapixels. The more details are visible. The lens magnification is good but can optionally be a notch higher as a mountable accessory.
4. Software option to hide settings and clock and date from the screen.
5. Slightly more robust wheel. so I can make better micro adjustments with the focus/focus point of the lens. Things are going a little rough now. I believe this is due to the coarser plastic grooves. Perhaps a metal rail is a better option.
6. visible buttons on the screen. The function is plastic, so black on black, and therefore no contrast. If it was colored white, it was more visible. More contrast.

This feedback will be given on initial discovery and has not been used in the field. The pinpointer gives a single green light upon FINDING the item, and increases to 3 lights when it is upon the item, so I hope that helps you understand my wording.

It found the penny 1" away, a nickel 3/4" away, a dime 1" away, and a quarter 1" away. But these were on a flat surface as the pinpointer approached from the side. If I hold these coins upwards so the pinpointer approaches the largest surface area, these numbers change:
Penny= 2"
Nickel=2"
Dime=1&3/4"
Quarter=2"

I, myself, am new to the hobby and will update with a proper review in a bit. Thanks for looking!

CO detector has a stand and shows CO level, green light, temp, and humidity. We set it up and after a couple days it started beeping as it was not plugged in. Not sure of accuracy of CO, but temp and humidity seem correct.

I bought this Ruyilam Ring Light as it was recommended to me along with a webcam.
It's very easy to use, and works right out of the box - no issues with USB2 or 3 ports at all.
There is plenty of cable, with a control panel in the centre, housing very intuitive user-friendly buttons.
There are three modes or 'colours' - a default brilliant light, a warm light and a normal enough light. Each mode can be adjusted up to ten times I think, so you can have it really low or really bright or somewhere in between.
I teach a lot online so it is a brilliant addition to any situation involving a webcam and online conferencing or whatever.
In the first photo above the light is clipped on to my laptop which is a fairly normal scenario. Next, there is a photo of how it clips on to the screen. The clip is not quite wide enough for a desktop computer screen and may spring off due to strain if it fits at all. I suppose it is designed more for laptops, although it does come with a very convenient tripod, so it doesn't always have to be fitted onto a screen.
In the other photos above, from left to right, there is a picture with no light, warm light, normal light and lastly the brilliant light. I'm sure it would be easy to get a little bit creative with positioning too.
I would highly recommend this device as it is reasonably priced and it is actually very helpful in providing a lighting solution that you may not have even realised was an issue. Very nice indeed.

Got a few surprises with this - good ones. I'm very pleased with the screen mounting bracket, very verm and so easy to fit and remove. I can see this having a use for other items as well. The mini tripod is also better than expected. Again, it's firm and stable so I can also use it for mounting the phone during video calls. The light itself is very bright and can be useful as a shadow filler light where main light is to one side. I can be useful for lighting up your working area rather than using main lights. The varying shades can enhance the skin tone - maybe the ladies will find more use for this facility. The 2m USB lead has an on/off switch, up/down brightness buttons and a toggle colour variation button.

When you open the incoming package, you will find that the packaging is very high quality. The brand is very careful in presenting their products and the materials are of high quality. The filter holder and adapter ring are metal and the filter holder has a spongy area whose function is to seal with the filter without letting light through. Once the filter holder is attached, it is easy to move. crtsal 100x100 quality is very good, with highly polished edges. The filter holder has two slots for square filters, but the advantage is that the ring screwed on the lens can be screwed with another round filter, for example a polarizing filter. I think the picture is very good. As with the brand's round filter, the sharpness is not lost, the color cast did not catch my eye, anything that can be edited during development is appreciated. The ND1000 filter included in the kit enables long exposures in strong light. The sample photos are photos taken on a cloudy afternoon with and without a filter. Those with filters were made with an exposure time of 20 seconds.