Hoya RM90

The 25mm diameter fits my lens perfectly and the infrared effect is exactly what I needed for my black-and-white landscape shots. Build quality feels solid, no scratches after a few uses.

I was worried the 3mm thickness might feel bulky, but it actually sits securely in the adapter without any wobble. The infrared effect with this filter is exactly what I was hoping for—deep blacks and crisp highlights.

The 25mm diameter fits my filter holder perfectly and the 3mm thickness means no flex when I'm threading it on. Blocks visible light exactly as expected for infrared work, and the optical glass is clean with no bubbles or coating flaws.