Very much up to the expectations of a K&F filter. Nicely made, thin brass frame. No observed color cast in images nor distortions. Comes well packaged and includes a soft carry case.

I now understand why K&F Concept products are made from brass. It is so resistant to torsional deformation and the screw easily fits filters from different manufacturers. Previously, I bought the "MARUMI Step Up Ring Made in Japan" on Amazon, and there were no problems at the beginning of the purchase, but after repeated use and careful storage, it gradually became unfit. In fact, I was quite impatient because the ND filter didn't fit on the outdoor site. Conclusion! If you're buying a large diameter like 82mm, I think this K&F Concept brass piece is the best because it's strong and sturdy!

K&F has been making some really fantastic filters lately. The build quality of these devices is excellent. Precision machined brass rings thin enough not to interfere with the image but strong enough to protect your glass. They screw on very easily and the brass prevents unplugging and threading. The optical quality of the glass is excellent. There is no distortion whatsoever and the nebula filter gives your images a very subtle, dreamlike quality. In my opinion something that is really impossible in Photoshop or with digital editing. You get the realism and quality of a real optical effect and these look absolutely gorgeous. Some people may disagree, but I always prefer to do as much as possible in camera to avoid post-processing. And for videos, this is of course a time saver. Applying this subtle fog effect digitally to video is very processor intensive. This is a neat little way to soften facial features a bit for portraits, and I decided to take a portrait of this little guy. You can really see the difference around the eyes that the filter makes, in addition to the fact that it was very bright and this filter helped soften the shadows. This is a 1/4 crap so the effect is very subtle. Don't let the Black Diffusion name confuse you. This filter brightens your images by reducing contrast and softening highlights. It actually brightens the image up a bit, but in a way that doesn't blur. That's the beauty of real optical filters and not digital post-processing effects. This compares to my German filters, which I have paid a lot more money for in the past.

The adapters from K&F, Beschoi and Gobe, which all seem to come from the same source, are of good quality. The second generation of these adapters is made of brass, and is therefore of a higher quality than the first, which used aluminium. The aperture can be easily adjusted, there is no play on the lens side, the adapter sits almost perfectly on the camera.

We unpacked the 10-30x50 telescope and found everything as described. The hand tripod and the mobile phone holder are made of plastic. The very light tripod has a stable ball head and is sufficiently stable. It should, too, if you want to attach your cell phone and the holder to it. The table tripod alone is quite useful. The mobile phone holder is more of a gimmick that we would not use in practice. It takes a relatively long time before we had attached and aligned the mobile phone together with the holder on the telescope. The picture that you get on your cell phone is very difficult to focus on. Due to the distance between the optics, the image naturally has wide vignetting and can only be seen as a small circle. We have not yet been able to get a photo image like in the advertisement with a mobile phone holder on a telescope. As with all mounts of this type, the whole construction is very sensitive to touch. The telescope itself makes a good impression. It is robustly built and feels good in the hand. Settings run smoothly and evenly. Once positions have been set, they don't change so easily by themselves when you carry them around. The image sharpness is satisfactory in every zoom range. Two rubber caps are included to protect the optics. They fit their positions tightly. Conclusion: Robust and handy telescope. weatherproof (No rain has penetrated) Good optical properties. Sharpness and zoom settings work well.

K&F’s build quality has been second to none in the last several years. They’ve created a series of extremely high-quality filters using very slim precision machined brass rings ( brass is a much better material to use for this purpose than aluminum. It’s much less likely to strip threads or to cross thread) and excellent optical glass.This filter is no exception. It has absolutely no optical distortion whatsoever. It filters UV and pretty much nothing else I think it has about a 99.9% visible light transmission.Most people use UV filters to protect their lenses but it’s also helpful to filter out UV light for photographic reasons. It can help to increase the life of your camera sensor and prevent distortion in the images.The anti-reflection coding on this is extraordinary. This competes well with my expensive high end German filters that cost up to four times as much money.This filter is slim enough that it should not interfere with the image or create any vignetting even with wide-angle lenses.This is my review for the UV filter but honestly every K&F filter I have purchased has been extraordinary.Look at the photo and see if you can tell any difference.

Debated entirely too long but eventually purchased. Get this tripod. I'm just an amateur for sure but I use you'd with my telescope and camera. RedCat 51 and Nikon to give you an idea. Exceeds all expectations.

K&F’s build quality has been second to none in the last several years. They’ve created a series of extremely high-quality filters using very slim precision machined brass rings ( brass is a much better material to use for this purpose than aluminum. It’s much less likely to strip threads or to cross thread) and excellent optical glass.

This filter is no exception. It has absolutely no optical distortion whatsoever. It filters UV and pretty much nothing else I think it has about a 99.9% visible light transmission.

Most people use UV filters to protect their lenses but it’s also helpful to filter out UV light for photographic reasons. It can help to increase the life of your camera sensor and prevent distortion in the images.

The anti-reflection coding on this is extraordinary. This competes well with my expensive high end German filters that cost up to four times as much money.

This filter is slim enough that it should not interfere with the image or create any vignetting even with wide-angle lenses.

This is my review for the UV filter but honestly every K&F filter I have purchased has been extraordinary.

Look at the photo and see if you can tell any difference.