In everything I'm going to say below, there are sample images.

I'll start by saying that the package it comes in is very well presented and complete.
It comes with the typical vacuum-sealed microfiber cloth and the solid case that holds the ring, plus you can store other filter sizes in it.

Regarding the filter, I zoomed in and looked at the sharpest areas, confirming that the loss of quality is minimal or nonexistent, meaning it's a very good option for keeping the lens protected.

Although it surprised me, since you might expect a UV filter to lose some brightness (even if it's very small), the opposite happened. As you can see in the histogram of the photos I've posted, the brightness increases slightly, even giving me zebra in some areas of the curtain. A curious phenomenon.

Interestingly, when it arrived, it was so clean that the glass was barely visible; it looked like an adapter ring. I also didn't notice any color drift or any kind of tint. You can see in a backlit photo of my hand holding the filter that it doesn't change.

I've had several products from this brand, and they're reliable, just like this one. I would definitely buy it again.