ToupTek SHO (S-II, H-a & O-III) 4nm Narrowband Filter Set - 36mm Unmounted
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- 4nm ultra-narrowband SHO design for extreme contrast and high-efficiency emission line mapping
- 36mm round unmounted filters, compatible with ToupTek AFW-M 7x36 Filter Wheel
- Multi-layer coatings for durability, scratch resistance, and long-term performance stability
- Specialized AR coatings and edge-blackening to completely eliminate halos and stray light
ToupTek Astro SHO 4nm Filter Set - 36mm Unmounted
Narrowband filters are essential for astrophotography. The ToupTek Astronomy SHO filter targets the three key ionized emission lines in stellar nurseries: Hα, SII, and OIII. With a narrower 4nm FWHM bandpass, it precisely transmits the target light while providing stronger suppression of urban light pollution and background gradients. This also reduces band overlap, resulting in higher signal-to-noise ratio, improved contrast, and more distinct detail. It is well-suited for creating images in the Hubble Palette.
ToupTek Astro SHO Filters in Action!
IC5070
IC 443
NGC2237
Core Features
ToupTek SHO filters feature high-purity quartz glass with over 90% transmission and durable IAD (Ion Assisted Deposition) coatings for long-lasting performance. Proprietary multi-layer coatings, anti-reflection treatments, and edge blackening help reduce halos, suppress stray light, and improve image contrast. An OD≥5.0 blocking level effectively eliminates unwanted wavelengths and imaging artifacts.
These filterd specifically isolate signals Hydrogen-Alpha (Hα), Sulphur (SII) and Oxygen-III (OIII). At the same time, they completely block out artificial light from city streetlights (like yellow sodium and mercury vapor lamps) that usually crowd the 540nm and 590nm ranges. By ignoring the light pollution and letting the target nebula light pass right through, the filters give you incredibly dark backgrounds and make the nebula pop with dramatic contrast and clarity!
Specifications
-
Filter Types: Sulfur II (SII), Hydrogen-Alpha (Hα), and Oxygen III (OIII)
-
Size: 36mm unmouted
-
Bandpass Width (FWHM): 4nm
-
Glass Substrate: Premium, high-purity Quartz Glass
-
Glass Thickness: 2.0 mm
-
Peak Transmittance: >90%
-
Optical Cutoff Depth: 5.0%
-
Target Wavelengths:
-
Hα: 656.3 nm
-
SII: 671.6 nm
-
OIII: 500.7 nm
-
-
Sensor Compatibility: Optimized for Full-Frame
-
Coating Technology: Durable, scratch-resistant Ion-Assisted Deposition (IAD) multi-layer coatings
-
Halo Suppression: Multi-layer anti-reflection (AR) system to eliminate internal reflections around bright stars
-
Stray Light Control: Matte black edge-blackened glass borders
-
Cell Material: CNC-machined aluminum alloy with a protective matte black anodized finish
-
Color Variations: Filter coating colors may appear different under various lighting conditions and viewing angles—this is a normal optical phenomenon
Other Information
- Country of Manufacture: China
ToupTek Astro SHO 4nm Filter Set - 36mm Unmounted
Narrowband filters are essential for astrophotography. The ToupTek Astronomy SHO filter targets the three key ionized emission lines in stellar nurseries: Hα, SII, and OIII. With a narrower 4nm FWHM bandpass, it precisely transmits the target light while providing stronger suppression of urban light pollution and background gradients. This also reduces band overlap, resulting in higher signal-to-noise ratio, improved contrast, and more distinct detail. It is well-suited for creating images in the Hubble Palette.
ToupTek Astro SHO Filters in Action!
IC5070
IC 443
NGC2237
Core Features
ToupTek SHO filters feature high-purity quartz glass with over 90% transmission and durable IAD (Ion Assisted Deposition) coatings for long-lasting performance. Proprietary multi-layer coatings, anti-reflection treatments, and edge blackening help reduce halos, suppress stray light, and improve image contrast. An OD≥5.0 blocking level effectively eliminates unwanted wavelengths and imaging artifacts.
These filterd specifically isolate signals Hydrogen-Alpha (Hα), Sulphur (SII) and Oxygen-III (OIII). At the same time, they completely block out artificial light from city streetlights (like yellow sodium and mercury vapor lamps) that usually crowd the 540nm and 590nm ranges. By ignoring the light pollution and letting the target nebula light pass right through, the filters give you incredibly dark backgrounds and make the nebula pop with dramatic contrast and clarity!
Specifications
-
Filter Types: Sulfur II (SII), Hydrogen-Alpha (Hα), and Oxygen III (OIII)
-
Size: 36mm unmouted
-
Bandpass Width (FWHM): 4nm
-
Glass Substrate: Premium, high-purity Quartz Glass
-
Glass Thickness: 2.0 mm
-
Peak Transmittance: >90%
-
Optical Cutoff Depth: 5.0%
-
Target Wavelengths:
-
Hα: 656.3 nm
-
SII: 671.6 nm
-
OIII: 500.7 nm
-
-
Sensor Compatibility: Optimized for Full-Frame
-
Coating Technology: Durable, scratch-resistant Ion-Assisted Deposition (IAD) multi-layer coatings
-
Halo Suppression: Multi-layer anti-reflection (AR) system to eliminate internal reflections around bright stars
-
Stray Light Control: Matte black edge-blackened glass borders
-
Cell Material: CNC-machined aluminum alloy with a protective matte black anodized finish
-
Color Variations: Filter coating colors may appear different under various lighting conditions and viewing angles—this is a normal optical phenomenon
| Manufacturer | ToupTek |
|---|
- 1x SHO filter set
- 1x Plastic hard cases for storage
- 4nm ultra-narrowband SHO design for extreme contrast and high-efficiency emission line mapping
- 36mm round unmounted filters, compatible with ToupTek AFW-M 7x36 Filter Wheel
- Multi-layer coatings for durability, scratch resistance, and long-term performance stability
- Specialized AR coatings and edge-blackening to completely eliminate halos and stray light
ToupTek Astro SHO 4nm Filter Set - 36mm Unmounted
Narrowband filters are essential for astrophotography. The ToupTek Astronomy SHO filter targets the three key ionized emission lines in stellar nurseries: Hα, SII, and OIII. With a narrower 4nm FWHM bandpass, it precisely transmits the target light while providing stronger suppression of urban light pollution and background gradients. This also reduces band overlap, resulting in higher signal-to-noise ratio, improved contrast, and more distinct detail. It is well-suited for creating images in the Hubble Palette.
ToupTek Astro SHO Filters in Action!
IC5070
IC 443
NGC2237
Core Features
ToupTek SHO filters feature high-purity quartz glass with over 90% transmission and durable IAD (Ion Assisted Deposition) coatings for long-lasting performance. Proprietary multi-layer coatings, anti-reflection treatments, and edge blackening help reduce halos, suppress stray light, and improve image contrast. An OD≥5.0 blocking level effectively eliminates unwanted wavelengths and imaging artifacts.
These filterd specifically isolate signals Hydrogen-Alpha (Hα), Sulphur (SII) and Oxygen-III (OIII). At the same time, they completely block out artificial light from city streetlights (like yellow sodium and mercury vapor lamps) that usually crowd the 540nm and 590nm ranges. By ignoring the light pollution and letting the target nebula light pass right through, the filters give you incredibly dark backgrounds and make the nebula pop with dramatic contrast and clarity!
Specifications
-
Filter Types: Sulfur II (SII), Hydrogen-Alpha (Hα), and Oxygen III (OIII)
-
Size: 36mm unmouted
-
Bandpass Width (FWHM): 4nm
-
Glass Substrate: Premium, high-purity Quartz Glass
-
Glass Thickness: 2.0 mm
-
Peak Transmittance: >90%
-
Optical Cutoff Depth: 5.0%
-
Target Wavelengths:
-
Hα: 656.3 nm
-
SII: 671.6 nm
-
OIII: 500.7 nm
-
-
Sensor Compatibility: Optimized for Full-Frame
-
Coating Technology: Durable, scratch-resistant Ion-Assisted Deposition (IAD) multi-layer coatings
-
Halo Suppression: Multi-layer anti-reflection (AR) system to eliminate internal reflections around bright stars
-
Stray Light Control: Matte black edge-blackened glass borders
-
Cell Material: CNC-machined aluminum alloy with a protective matte black anodized finish
-
Color Variations: Filter coating colors may appear different under various lighting conditions and viewing angles—this is a normal optical phenomenon
Other Information
- Country of Manufacture: China
| Manufacturer | ToupTek |
|---|
- 1x SHO filter set
- 1x Plastic hard cases for storage
ToupTek SHO (S-II, H-a & O-III) 4nm Narrowband Filter Set - 36mm Unmounted