ZWO 1.25″ Ha SII OIII 7nm Narrowband Filter Set
AED 1,360.00
ZWO Narrowband Filter Set with 1.25″ OIII, SII, and H-Alpha Filters
- Narrowband Filters: Includes three filters for Hydrogen Alpha (Ha), Sulfur II (SII), and Oxygen III (OIII).
- Bandwidth: Each filter has a bandwidth of 7nm.
- Peak Transmission: Over 80% transmission at the key wavelengths:
- Ha: 656nm
- SII: 672nm
- OIII: 500nm
- Glass Thickness: 2mm thick, fine-optically polished to 1/4 wavefront accuracy.
Out of stock
Description
ZWO 1.25″ Narrowband Filter Set – OIII, Ha, SII
The ZWO 1.25” SHO Filter Set includes three 1.25” mounted astrophotography filters that pass light in a narrow 7nm band from ionized sulfur (SII) at 672nm, Hydrogen Alpha (at 656nm), and ionized oxygen (OIII) near 500nm. By taking individual images with each of these filters and a monochrome astronomy camera (sold separately) and combining the images with standard processing techniques, you can create high-contrast images of emission nebulae (like the Orion, Lagoon, and Eagle Nebulae), planetary nebulae (such as the Ring, Dumbbell and Helix Nebulae), and supernova remnants such as the Veil Nebula.
Here are the key features of the ZWO 1.25″ Ha SII OIII 7nm Narrowband Filter Set:
Narrowband Filters:
- Three filters included: H-alpha (Ha), Sulfur II (SII), and Oxygen III (OIII).
- Narrow bandwidth: Each filter passes a specific wavelength of light, isolating emission lines from nebulae.
- 7nm bandwidth: This narrow bandwidth helps to reduce light pollution and improve contrast.
Image Enhancement:
- Increased contrast: Filters block most unwanted light, allowing nebulae to stand out against the background sky.
- Improved detail: Filters reveal fine details within nebulae that are often obscured by light pollution or other factors.
- Enhanced color: By combining images from the three filters, you can create stunning, color-rich images of nebulae.
Technical Specifications:
- Filter size: 1.25 inches
- FWHM: 7±0.5nm
- Thickness: 2.0±0.03 mm
- Transmission: Approximately 90% at selected wavelengths
- Infrared wavelength cut-off: 700-1100nm
- Off-band transmission: <0.1% (OD3)
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Model Number
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NB7nmD1.25 |
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Single Filter, Set, or Accessory
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Filter Set |
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Filter Type
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Narrowband |
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Filter Size
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31.75mm (1.25″) |
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Filter Shape
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Round |
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Filter Insert Style
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Threaded |
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Filter Bandwidth/Bandpass
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7 nm |
Additional Features:
- Fine optically polished glass: Ensures accurate 1/4 wavefront accuracy over both surfaces.
- Multiple layers of anti-reflection coatings: Minimize light loss and improve image quality.
- Mounted in a metal cell: Provides protection and easy use.
- Ideal for emission nebulae, planetary nebulae, and supernova remnants.
- Compatible with monochrome astronomy cameras.
Benefits of Using Narrowband Filters:
- Reduces the effects of light pollution: Allows you to observe and image nebulae from light-polluted areas.
- Improves image contrast and detail: Reveals faint details that are otherwise obscured.
- Creates stunning, color-rich images: Produces images that are reminiscent of those taken by professional observatories.
- 1.25″ mounted OIII 7nm Filter
- 1.25″ mounted SII 7nm Filter
- 1.25″ mounted H-a 7nm Filter
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