Promaster 72mm UV Filter - HGX Prime

The coating is so smooth and easy to clean, I barely notice it's on the lens. My images look just as sharp as without it, which is exactly what I wanted for protection.

Took a few test shots against a bright window and the colors stayed crisp with zero haze—the multicoating is doing its job. It screwed onto my lens smoothly and the slim ring doesn't cause any vignetting at wide angles. For the price, it's a solid piece of glass that I don't worry about leaving on.

The glass is ground and polished so precisely that I noticed zero image degradation even at f/1.4. It threads onto my lens butter-smooth and the coating seems to repel dust nicely.