Description

Replacement filter masks for ZWO Electronic Filter Wheels (EFW). These thin metal masks sit between filter positions in the wheel to block stray light from adjacent filters during imaging. Each mask set is designed for the ZWO 7×2″ and 5×2″ filter wheel models.

If your filter wheel came without masks or you need replacements, these ensure clean light paths through each filter position. Properly installed masks prevent light leaks between filters that can cause unwanted gradients or glow in your images, especially when using narrowband filters alongside broadband ones.

Explore these guides from our Astro Wiki to learn more about this type of equipment:

Narrowband Filters Guide → Filters for Astrophotography →