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Due to the USA–China tariff escalation, we will temporarily not receive additional inventory for Celestron and Sky-Watcher products. As a result, we are unable to accept orders for any out-of-stock items and encourage you to take advantage of the products currently in stock while supplies last.
Due to the USA–China tariff escalation, we will temporarily not receive additional inventory for Celestron and Sky-Watcher products. As a result, we are unable to accept orders for any out-of-stock items and encourage you to take advantage of the products currently in stock while supplies last.
ZWO Narrowband SII Filter - 7nm

ZWO Narrowband SII Filter - 7nm

by ZWO
SKU ZWO-SII7nm1.25
$0
$129.00 USD - $249.00 USD
$129.00
$129.00 USD - $249.00 USD
$129.00 USD
  • Precise 7nm Bandpass
  • Enhanced Contrast for Emission Nebulae
  • Light Pollution Reduction
  • High-Quality Optics
  • Durable Construction
  • Compatible with Standard Filter Sizes
Availability:
1 in stock
Availability:
Backordered
Contact us to know when we will receive our next ones!
Check the other options, 1 is in stock!
Availability:
Backordered
Contact us to know when we will receive our next ones!
Check the other options, 1 is in stock!

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  • ZWO Narrowband SII Filter - 7nm - Overview

    Astrophotography Product

    The ZWO Narrowband SII Filter - 7nm is an essential tool for astrophotographers looking to capture the rich sulfur emission lines (672.4 nm) emitted by nebulae and other celestial objects. This filter enhances contrast and detail by isolating the SII wavelength, making it perfect for imaging emission nebulae in regions with heavy light pollution or under moonlit skies.

    Precise 7nm Bandpass

    The narrow 7nm bandpass effectively isolates the sulfur-II emission line, minimizing interference from other wavelengths and enhancing the visibility of faint celestial details.

    Enhanced Contrast for Emission Nebulae

    Specifically designed to bring out the intricate structures and textures of emission nebulae, such as the Pillars of Creation or the Rosette Nebula.

    Light Pollution Reduction

    Ideal for urban astrophotography, this filter blocks artificial light sources and natural skyglow, enabling clear and detailed captures.

    High-Quality Optics

    Made with precision optical glass and multi-layer coatings, the filter ensures high transmission rates at the SII wavelength while reducing reflections and halos.

    Durable Construction

    Designed to withstand the rigors of astrophotography, with scratch-resistant and anti-reflective coatings for long-lasting performance.

    Compatible with Standard Filter Sizes

    Available in multiple sizes (1.25", 2", and others) to fit various imaging setups, including ZWO cameras and filter wheels.

    Why Choose This Product

    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.

    Why Choose This Product
    In the Box

    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)

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