Svbony SV220 Telescope Filter H-Alpha and OIII 3nm Dual-Band 1.25 inch/2inch Narrowband Filter for Astrophotography

The SV220 H-Alpha 3nm and O-III 3nm Dual-Narrowband Filter enhances astrophotography by reducing stray light and light pollution. With a wide cutoff range of 300 - 1050nm and an average OD5, it effectively reduces stray light and light pollution, enhancing image clarity. Its 3±1nm bandwidth make celestial details clearer. With minimal halo coating, it ensures sharp, high-contrast images. Available in 1.25-inch and 2-inch, it’s suitable for capturing deep-sky objects.Comparison chart of effects before and after useDual narrowband passbands at H-Alpha and O-III, with 3nm bandwidth for high contrast. >85% peak transmission captures faint details. Average OD5 blocks 99.999% stray light for clean images. Ideal for Astrophotography — Superior for capturing clear, high-contrast deep-sky images even under light-polluted skies. Average OD5: SV220 3nm Dual-Narrowband Filter offers a wide cutoff range of 300-1050nm; its transmittance is as low as 0.001%; effectively suppressing stray light and light pollution; improving signal-to-noise ratio for more detailed images Minimal halo coating design: the 3nm H-Alpha and O-III Narrowband Filter features a minimal halo coating that reduces glare; ensuring sharp; detailed imaging of celestial objects with enhanced contrast; color accuracy; and reduced light pollution Minimal halo coating design: the 3nm H-Alpha and O-III Narrowband Filter features a minimal halo coating that reduces glare; ensuring sharp; detailed imaging of celestial objects with enhanced contrast; color accuracy; and reduced light pollution85%+ transmission rate: the SV220 3nm H-Alpha and O-III Narrowband Filter offers high contrast and detailed imaging; enabling fast capture of deep-sky objects even in heavily light-polluted citiesM28.5 × 0.6It can be securely connected to most astronomical camera devices.FWHM: the SV220 3nm Dual-Narrowband Filter's narrow bandwidth of 3±1nm can effectively filter out most of the background stray light; making the details of the target celestial object clearerCan be used with other SVBONY hot-selling products