ZWO 1.25" Narrowband Filter Set - Ha, OIII, SII

The ZWO 1.25″ Narrowband Filter Set is a premium kit for monochrome astrophotography, enabling you to capture stunning, multi-color deep-sky images even from light-polluted urban areas. This set includes three essential filters: Hydrogen-alpha (Ha), Oxygen III (OIII), and Sulfur II (SII). By isolating these specific emission lines, the filters block nearly all other light pollution, including artificial lights. This allows you to collect high-contrast, detailed data on nebulae, which can then be combined into a final full-color image using the popular Hubble Palette or other processing techniques. This filter set is a must-have for any serious deep-sky imager.

• Thread Size: 1.25″
• Included Filters: Ha, OIII, SII
• FWHM: 7 nm (Ha, SII) and 7 nm (OIII)
• Glass Type: Schott glass
• Coatings: Multi-layer anti-reflection coatings
• Primary Use: Deep-sky imaging of emission nebulae
• Compatibility: All monochrome cameras and filter wheels with 1.25″ threads

• ZWO Ha 1.25″ Filter
• ZWO OIII 1.25″ Filter
• ZWO SII 1.25″ Filter
• Protective Plastic Case