ZWO Narrowband SII Filter - 7nm

Applications

• Advanced Narrowband Imaging: Combine the SII filter with H-alpha and OIII filters to create stunning, detailed, and scientifically accurate tri-color images of deep-sky objects.
• Light-Polluted Skies: Achieve professional-quality results even in urban environments with high levels of artificial light.
• Long-Exposure Astrophotography: Enhance faint details in emission nebulae during extended exposure times without worrying about skyglow interference.

Why Choose the ZWO Narrowband SII Filter - 7nm ?

This filter is a must-have for astrophotographers aiming to capture breathtaking images of sulfur-rich celestial objects. Its narrow bandpass, superior optics, and durability make it a reliable tool for both amateur and professional astrophotographers. Whether you're imaging from a dark-sky site or a light-polluted urban area, the ZWO Narrowband SII Filter - 7nm ensures outstanding performance and exceptional image quality.
Add the ZWO Narrowband SII Filter - 7nm to your astrophotography toolkit and take your imaging to new heights. Experience the beauty and detail of the cosmos as you've never seen before, capturing the essence of nebulae in stunning clarity.
Elevate your astrophotography with the ZWO Narrowband SII Filter - 7nm—your gateway to capturing the hidden sulfuric wonders of the night sky.

Technical Data

• FWHM：7±0.5nm
• Glass Thickness 2.0+/-0.03 mm (31mm/36mm)
• Fine-optically polished to ensure accurate 1/4 wavefront over the both surfaces
• About 90% transmission at H-alpha line 656nm (H-Alpha filter )
• About 90% transmission at SII line 672nm (SII filter )
• About 90% transmission at major OIII line 500nm (OIII filter )
• Infrared wavelength 700-1100nm cut-off
• <0.1% transmission of off-band, OD3(Optical Density)