ZWO D21 IRカット保護窓 - D21IR-CUT1

I was worried about dust getting on my camera sensor, but this window solves that perfectly—the coating is clear and doesn't affect my planetary shots at all.

The IR-cut filter threads on perfectly to my ASI178MC, and the clear aperture is exactly what I needed for imaging without any vignetting. I’ve left it on for two weeks of sessions and the glass still looks spotless, so it’s doing its job protecting the sensor.

Installed this on my ASI224MC and it threaded on smoothly without any alignment issues. The IR-cut is doing its job, noticeably cleaner views of Jupiter even with some high clouds around. Only ding is I wish the packaging included a small wrench for tightening.