dont often write reviews but I had to do this one because I used to think K&F glass was poor quality because they tend to be cheaper. I was wrong, If you’re buying any K&F filter, You gotta buy the Nano X Series. It’s fantastic Glass. When I got my Fujifilm 23mm F2 Lens i wanted to cover it to prevent scratches and possible breakage as this is my daily camera and it takes a beating hanging and swinging from my neck all day. I saw the Fusion One Next Protector From Hoya, the reviews were good and the price was high, I believed it was best, but while using it i could see the glaring in low light like a thin layer of white over photos. Yes it’s not enough to ruin a photo but if you care about details you’ll notice the difference. I have other Nano-X mist filters and NDs so i decided to try this one. I did a test in a controlled lighting environment in manual settings to test both uv filters and the K&F nano X came out cleaner with the glare. It fits well note, the purpose of this is to protect my lens, nothing else. I’ve included photos from the test but i doubt you’ll be able to see it as the quality will drop from uploading.