This battery is a marvel! I do a lot of professional video shooting and the shots that need to be taken are - very often - far from power sources... So I plug my camera into a fake D-TAP battery, my lighting back-up etc... This battery has not one, but two D-TAP outputs, a PB interface, a USB-C port (PD Fast Charge) and a USB-A port. In short, everything you need for mobility and of course a V-Mount attachment to put it on standard supports. So it doesn't have a very small format if we compare it to classic power banks for the same capacity but on a camera it fits perfectly (and it's not exactly the same use). It makes my shooting so much easier that even when I have access to power, I use the battery to avoid running cables. I knew K&F Concept well for the quality of its photo filters, but the same care is given to this battery.

bought the adapter because I also want to use my existing Nikon lenses on the new BMPCC4K. Since the vast majority of lenses have an aperture lever, they can also be used although they do not have a separate aperture ring (lenses without an E-mark!). The adapter makes a very valuable impression. It is made of metal and feels good in the hand. It easily connects to the camera and lens. I haven't found any game so far. If this occurs during use and possibly leads to scattered light, I will provide an update. The adapter is delivered in a small plastic box. This makes it easy to store or transport when not in use. The silver ring is used to set the aperture. However, there are no numbers, only a symbol for an open and one for a closed aperture. But you can see directly on the display how turning the ring affects the brightness. So I don't miss numbers. In addition, I have read on other adapters with numbers on the ring that these values are not as finely graded as the numbers make it seem. I am very happy with this adapter. Of course, you lose light intensity because every assembly between the lens and the sensor "swallows" light. But this adapter only costs a fraction of what a Speed Booster costs. Also, you can't get a speed booster with contacts for Nikon lenses. No information is passed on to the camera, so you have to set everything manually even when using a speed booster. I can highly recommend this adapter to anyone who can get along with a somewhat lower light intensity.

First impressions: - good looking - fine workmanship - matte interior finish (light doesn't jump in) - smooth conformance to camera body - smooth shift rotating One ring - comes in an unsealed hard case and nothing else on it - out of the box with any vintage Nikon mount usable lenses - orange ring gives the looks to the whole camera setup - the adapter fits harder on the lenses (needs to be attached) - focus is based more on the depth of field (FOD) difference in the picture frame - it works more like zone focusing and precession focus zones are heavy to reach - metal mount on lens side and (I think it's still a metal) black plastic which looks nice, camera charcoal mount (it's passive adapter and therefore no electrical communication between lens and camera) - light doesn't get through the adapter into the Barrel (sealed fit) - it should come with end caps to the adapter to keep dust out when not in use - for the money I paid I like experimenting with my old lenses on the Sony mirrorless body

If you turn on the IR illuminator and turn off the viewer, you think the entire device is off...but the IR illuminator is still on!!!!! You can power the device with a power bank via a USB cable to carry less weight and ensure longer runtime.

Press the power button 2 times to stay on while the device is connected to a USB charger. Great microscope/magnifying glass. I find that the color is a bit different due to the lighting, but 100 percent usable!! and it saves images on the flash card. All in all... AWESOME

Just waht you need with charge needs like usb phone cord and solar chargeable power packs.

I would first like to emphasize that I purchased this microscope set privately and NOT as a product test.

The reason was quite simply that I was actually looking for a soldering glass and came across this product. Since I have a teenage son, he could also use this set as a substitute for a microscope. So I kill two birds with one stone.

About the device itself:
It is a high-quality electronic screen magnifier with a high-contrast 10.1" color screen. The sensor has a high resolution, which unfortunately is not defined in more detail. However, it is sufficient for high resolutions in photo and video format up to 2160P UHD video for moving images.

The microscope is powered via a USB-A power connection. A USB power adapter is not included. A power bank, for example, supplies enough energy for hours.

The microscope is delivered slightly disassembled, but can be easily put together. The instructions are written in multiple languages ​​and are easy to understand. You should fall back on it, especially when setting up the screen, because not everything can be found intuitively right away. You should configure the language first, because the other features you need. A 32GB Micro SD card is included and is used to store screenshots and videos.
Especially at high magnifications, it is noticeable that any vibration or movement in the image can be seen greatly enlarged.

Various utensils are supplied for handling. There is a slide holder with lighting, spring clips for circuit boards and 2x flexible LED lamps to illuminate other objects. With the focus wheel it is easy to set this precisely to fix the desired level.

Even if I use this magnifying glass privately, I also know it from the company where small items are sorted out by hand. The loupes in the company are far worse than this system.

I was impressed with the packaging. It came with the usb cable but you have to use your own USB adapter, I let it charge & I followed the steps to calibrate it, which was easy to do. Overall nice easy to use/learn product. I would recommend to a friend