This has been by far the best camera I have used so far. The rotation is a game changer.

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...

Quality best inspection camera I ever own.

I was really surprised at how easy it was to use, my 5 year old son absolutely loves it and wanted to put everything under the lens. You can see how clear the quality of the picture is, even with this much zoom, he's having so much fun looking at everything so close, from toys, some groceries, coins, and everything else. The center dial is the main focus point and it can focus no matter how close the subject is, the LCD screen is of amazing quality and a great size for everyone to see. Highly recommended for anyone wanting to teach kids new skills and adults can benefit too.

use a combination of M42 lens, main adapter and VM adapter VM-E Close Focus Adapte α7. There is no practical problem, although there is a slight overflow, the tightening and loosening is smooth, and there seems to be no problem with the working accuracy. If you notice, it's still attached to all M42 lenses. Speaking of greed, I wouldn't say the color is a bit dull.

Now that I've used it once for my work, I can comment on it in my opinion. I use it for photos of interiors, cider houses, restaurants... also for close-ups of people where I need it to appear quite deep (a chef with a plate for example). The first couple of times I used it with a tripod so manual focus isn't a problem, use the Liveview to focus (everything looks so sharp no matter what parameters you use, it's hard to tell the specific focus point), i close the aperture at 7.1 or 11 and that's it, everything in the picture is perfect. For handheld photos it's easy to get the point by using an approximate hyperfocal and just closing in at f/5.6, a few extra shots just in case and no problem. It's not as comfortable as my 17-40L, with its ultrasonic focus of course, but at this price point let's see what other ultra angle you have...none. The brutal sharpness really surprised me. Very good picture quality for what it costs, impressive. The colors are very good, like any other good lens. Chromatic aberrations... What is it? I haven't seen any of them yet. The geometric distortion is very moderate for the angle as long as you take the photo from the right angle. For my work, many cider houses, not being able to put a good UV filter in front of it bugs me (there can always be accidents with people and drinks), but hey, extreme caution is required. It's slightly lighter than the 17-40 mentioned above, has a relatively small size and is very portable. The focus ring is very good, too long for close objects, and it rotates well and tightly, it doesn't move by itself. The aperture ring is the same. Since I'm used to using old manual lenses (with my analog cameras), it's not that awkward to use either. It doesn't have the plastic feel that other lenses give, it's well built without being a black leg, but it doesn't feel like you've just bought a toy. Due to the case's shape, which serves its function well and is easy to put on and take off, the built-in sunshade will soon be covered in scratches, but hey, that's nothing. Of course, I hesitated for a long time before deciding to buy it (it was the historically low price that made me do it), but I don't regret it in the least. For its characteristics, not for constant use or to "tie it to the camera without removing it" but for whatever use I give it and at this price... I can hardly ask for more. Nice birthday self gift :)

*For the cost* (very important) this lens does everything you need a cheap, fast 35 f/2 to do. The build quality and feel are surprisingly good. The focus ring is satisfyingly tactile — smooth and large enough for my fingers to have an easy, snug grip, unlike my Nikkor D lenses. It's not the widest aperture for a 35, but for less than $100 you get functionality and value. We use this lens to film vlogs indoors with cheap studio lighting and it works well enough for our needs. It's soft all the way to the edges at F2 and difficult to focus with. The AF is quite slow but seems accurate enough. I plan to try this lens for astrophotography but don't have high hopes due to the lack of sharpness at F2, but I'll keep an open mind until I test it. However, when attenuated to f/2.8, clarity and sharpness improve significantly. We shoot our indoor vlogs at f3.2 for that extra depth of field, but would have no problem dropping down to 2.8 if needed, and the improved sharpness is nice at 3.2. I've attached two files — a full-size image of a section of tree, unprocessed at f/2 (1/4000th of a second to eliminate motion blur) and a cropped version of that file to show the poor sharpness right in the center of the frame. The lens is a nice size. Slightly larger than my Nikkor 50mm but smaller than my Rokinon 85mm. It works well with my Nikon D500 and when the focus is where you need it the images look good. It also focuses close enough for close-up macro photography, so that's nice. That sucks compared to other more expensive 35s out there, but these lenses cost hundreds and hundreds of dollars more. So I give it a 4/5. It's a great lens for getting the feel of a 35mm lens, but I wouldn't recommend it at all for professional use. + Good workmanship Inexpensive close-up focus - Slow autofocus, not sharp at f/2

The quality of the pictures is really good. Even the close-up focus does not blur the image. The LEDs Lighting do their job well. In the attached photos you can see how well the device works when inspecting the drain of a sink. The practical case. The ability to record videos is not to be underestimated.