Filters

The ZWO Duo-Band filter is a 1.25″ filter designed for astrophotography. It allows users to capture both H-alpha and OIII wavelengths in one shot, making it ideal for capturing emission nebulae. The filter has a 7±0.5nm FWHM bandpass, fine-optically polished surfaces to ensure maximum light transmission, and a <0.1% transmission of off-band, OD3 (Optical Density). It also has about 90% transmission at the H-alpha and OIII lines and has an infrared wavelength 700-1100nm cut-off and a UV/IR cut-off at 400nm and 700nm. The filter is compatible with a wide range of telescopes and cameras and comes in a protective case for safe storage. Feedback about the ZWO Duo-Band filter has been positive, with users praising its ability to capture both wavelengths in one shot, high-quality materials, and excellent image quality.

Overall, the ZWO Duo-Band filter is a versatile and high-quality filter that simplifies astrophotography by allowing users to capture both H-alpha and OIII wavelengths in one shot. Its high-quality materials and fine-optically polished surfaces result in excellent image quality, and its compatibility with a wide range of telescopes and cameras make it a great addition to any astrophotography setup.