IR800 Pro 1.25"

I've been using this 1.25" IR-pass filter for astrophotography, and the fused quartz glass really makes a difference in image clarity. The steep cut-off at 800nm blocks visible light completely while letting through infrared. It threads onto my nosepiece perfectly with the 1 1/8"-48 mount.

Switched to this 1.25" IR-pass filter for infrared work and the steep cut-off line really cleans up my images. The fused quartz glass is thinner than my old filter but feels solid when threading on.

The fused quartz glass feels much sturdier than standard filters I’ve used. Mounted easily onto my lens and the 800nm cutoff is exactly what I needed for infrared work.