This filter is doing its job perfectly. It catchs night light pollution so I could take clear night sky. I've tried it at Josua tree national park to capture Neowise comet, and it worked perfectly.

Shooting in the city always undermines the results because of light pollution. But even in Bolter meter 4 light bollution I was able to use this filter get the desired effects I wanted in my photos. As a novice astrophotography I recommend.

Construction is very good with rubberized edge ridges for easy installation and removal, especially important for a filter that will only be used for night sky photography. Light transmission is good with no apparent chromatic aberration from edge to edge. The filter doesn't easily attract dust and cleans well with a quality microfiber cloth. While I've only taken a few night test shots, the filter appears to be very effective, especially for sodium vapor light pollution. One more item of note - the filter case is the best I've ever received with a filter of any price!

I’ve been a fan of K&F Filters for some time now, and have come to appreciate the consistency and the quality of the brand. The majority of my lenses live their lives with a K&F Concept UV protective filter on their front element.

I have done enough testing of the transmittance and sharpness of K&F UV filters in the past that I now consider them a trusted brand; I feel confident in their quality. And that’s the point, right? In my opinion, they’re a trusted seller.

I needed a protective filter for a new lens I purchased, a 28mm; the ultra-slim frame of the MCUV filter is why it became of interest to me and the reason I ordered it. And for that reason, it worked out well; it doesn’t infringe on the image area. Therefore, it doesn’t introduce any vignetting.

UV filters have an efficacy when recording on film, even though some emulsions are/were formulated to be insensitive to UV light, but have no added benefit when capturing to a digital sensor. Modern digital sensors, unfiltered, record the entire spectrum of visible light, as well as portions of the spectrums of invisible infrared and ultraviolet light. In order to record only visible light, so photographs appear the way we see the world, digital camera manufacturers install what is called an IR Cut Hot Mirror filter over the digital sensor and its Bayer Array. Digital cameras sold without this filter are referred to as a “Full Spectrum Camera.” If you’re not sure if your camera is full spectrum, it’s not. Which means you don’t need to filter out UV light, it already is.

In the case of my digital imaging, I use UV filters to protect the front element of expensive lenses. And in that respect, the K&F Concept MCUV Filter provides protection for expensive lenses without impacting camera settings or image quality, in effect providing inexpensive insurance.

As I noted at the beginning, I’ve come to rely on the quality of K&F filters, and for the reasons that the seller asserts, but most importantly to me, the high quality of their AGC multi-coated, anti-reflective glass; AGC is a Japanese company and the largest manufacturer of glass in the world. Another reason I have confidence in K&F filters.

The filter is supplied with a lens cap, a lanyard for the lens cap, a high-quality microfiber lens cleaning cloth and a plastic storage case.

It eliminates light pollution quite a bit, and it slows down light by half a step. There is a bit of magenta that can easily be removed in editing.

I liked everything about the price

So, let's start by saying what these filters DO NOT do (any, any brand). These filters do not remove light pollution. If that were the case, you could photograph the Milky Way from the center of Rome or Milan, and of course that's not possible. Light pollution, if there is, cannot be removed in any way. So what do these filters do? The street lamps of the cities almost all give a light on the dark orange, which gives the landscape and the sky an annoying dominance. These filters do nothing but CONTROBALANCE this dominant with a colder color and as a result you have photographs with dominant orange much less marked and with blue skies. This is what makes these filters and in this case it does quite well.

It reduces light pollution in certain scenarios where light pollution is low, but near cities or near urban environments, although several youtubers dedicated to the world of photography say that in the latter environments it greatly reduces become. It is solid and of good quality, it fits perfectly in the Nisi filter holder.