ToupTek PureSight A1 Dual Band H-a & OIII 5nm Filter - 2" Mounted
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- Optimized for Fast Optics and engineered for high-performance on fast telescops from f/3.2 down to f/2.8
- Ultra-Narrow 5nm Bandpass drastically cuts through extreme city light pollution while maximizing weak nebula signals
- Advanced Halo Suppression with multi-layer anti-reflection coatings to eliminate internal reflections and star ghosting
ToupTek Astro PureSight A1 Dual Narrowband Filter - 2"
The ToupTek Astro PureSight A1 Hα & OIII Dual Narrowband Filter is designed for deep-sky astrophotography under light-polluted skies. With a precise 5nm bandpass and optimization for fast optical systems, it enhances nebula contrast while effectively suppressing unwanted background light.
A dual narrowband filter is an astrophotography filter designed to isolate specific emission wavelengths, typically hydrogen-alpha (Hα) and oxygen III (OIII). By transmitting only these narrow spectral bands, the filter significantly enhances the visibility of emission nebulae while suppressing background light pollution. Dual narrowband filters are widely used for deep-sky astrophotography, especially when imaging nebulae from urban or suburban locations where sky brightness can reduce contrast!
ToupTek PureSight A1 put to the Test!
SH2-308 (Bortle 4.9)
Rosette Nebula (Full Moon)
Exceptional Image Purity
- High-purity fused silica substrate combined with IAD (Ion Assisted Deposition) coating for dense and uniform layers.
- Advanced anti-reflection coatings significantly reduce internal reflections, halos, and ghosting.
- ≥90% peak transmission, ≤30" parallelism, and 60/40 surface quality ensure a clean background and sharp stars.
- Capture faint nebula details even from urban balconies or city skies.
Fast Optical Systems
ToupTek Astro PureSight A1 Hα & OIII Dual Narrowband 5nm F/3.2 Astronomical Filter is engineered specifically for astrophotography with fast optical systems.
With precisely controlled 5nm FWHM bandpasses and center wavelengths optimized for fast optics, the filter delivers excellent performance on systems from F/3.2 and faster, achieving an ideal balance between strong light-pollution suppression and high signal transmission.
Advanced anti-reflection coatings and carefully controlled surface precision significantly reduce internal reflections, effectively suppressing halos and ghosting. The result is clean backgrounds, high contrast, and sharp stars, even when imaging from urban or suburban locations.
Installation
ToupTek Astro PureSight A1 5nm Hα & [OIII] Dual Narrowband Filter features a specialized coating process that eliminates the need to identify front or back—simply screw it in for quick and easy installation.
The filter comes standard with a 2-inch housing and M48×0.75 thread, ensuring direct compatibility with most astrophotography accessories. During installation, please ensure that the threaded side faces the camera sensor.
Specifications
-
Filter Type: Dual-Narrowband (Hα + OIII)
-
Size Configuration: 2-inch
-
Filter Thread: M48 x 0.75
- Clear Aperture: 43.9 mm
-
Bandpass Width (FWHM): 5.0nm
-
Target Emission Lines:
-
Hydrogen-Alpha (Hα) at 656.3nm
-
Oxygen III (OIII) at 500.7nm
-
-
Optical Optimization: Optimized for f/3.2 and faster (with stable, verified mapping down to f/2.8)
-
Glass Substrate: High-purity, colorless transparent fused silica glass
-
Glass Thickness: 2.00 mm (± 0.1mm margin)
-
Peak Transmittance: >90%
-
Blocking Depth: OD 5.0 cut-off depth across the 200–1100nm spectrum
-
Optical Precision Quality: Symmetrical parallelism and a 60/40 optical surface finish for sharp, non-bloated star profiles
-
Coating Technology: Dense, uniform Ion-Assisted Deposition (IAD) multi-layer coating system
-
Halo Suppression System: Advanced anti-reflection (AR) coating
-
Stray Light Control: High-strength aluminum alloy cell finished with a specialized internal matte black treatment
-
Sensor Compatibility: Full-Frame, APS-C, and smaller One-Shot Color (OSC)
-
Installation Direction: Bidirectional coating engineering allows flexible setup; simply secure it with the threaded side facing toward your camera sensor
Other Information
- Country of Manufacture: China
ToupTek Astro PureSight A1 Dual Narrowband Filter - 2"
The ToupTek Astro PureSight A1 Hα & OIII Dual Narrowband Filter is designed for deep-sky astrophotography under light-polluted skies. With a precise 5nm bandpass and optimization for fast optical systems, it enhances nebula contrast while effectively suppressing unwanted background light.
A dual narrowband filter is an astrophotography filter designed to isolate specific emission wavelengths, typically hydrogen-alpha (Hα) and oxygen III (OIII). By transmitting only these narrow spectral bands, the filter significantly enhances the visibility of emission nebulae while suppressing background light pollution. Dual narrowband filters are widely used for deep-sky astrophotography, especially when imaging nebulae from urban or suburban locations where sky brightness can reduce contrast!
ToupTek PureSight A1 put to the Test!
SH2-308 (Bortle 4.9)
Rosette Nebula (Full Moon)
Exceptional Image Purity
- High-purity fused silica substrate combined with IAD (Ion Assisted Deposition) coating for dense and uniform layers.
- Advanced anti-reflection coatings significantly reduce internal reflections, halos, and ghosting.
- ≥90% peak transmission, ≤30" parallelism, and 60/40 surface quality ensure a clean background and sharp stars.
- Capture faint nebula details even from urban balconies or city skies.
Fast Optical Systems
ToupTek Astro PureSight A1 Hα & OIII Dual Narrowband 5nm F/3.2 Astronomical Filter is engineered specifically for astrophotography with fast optical systems.
With precisely controlled 5nm FWHM bandpasses and center wavelengths optimized for fast optics, the filter delivers excellent performance on systems from F/3.2 and faster, achieving an ideal balance between strong light-pollution suppression and high signal transmission.
Advanced anti-reflection coatings and carefully controlled surface precision significantly reduce internal reflections, effectively suppressing halos and ghosting. The result is clean backgrounds, high contrast, and sharp stars, even when imaging from urban or suburban locations.
Installation
ToupTek Astro PureSight A1 5nm Hα & [OIII] Dual Narrowband Filter features a specialized coating process that eliminates the need to identify front or back—simply screw it in for quick and easy installation.
The filter comes standard with a 2-inch housing and M48×0.75 thread, ensuring direct compatibility with most astrophotography accessories. During installation, please ensure that the threaded side faces the camera sensor.
Specifications
-
Filter Type: Dual-Narrowband (Hα + OIII)
-
Size Configuration: 2-inch
-
Filter Thread: M48 x 0.75
- Clear Aperture: 43.9 mm
-
Bandpass Width (FWHM): 5.0nm
-
Target Emission Lines:
-
Hydrogen-Alpha (Hα) at 656.3nm
-
Oxygen III (OIII) at 500.7nm
-
-
Optical Optimization: Optimized for f/3.2 and faster (with stable, verified mapping down to f/2.8)
-
Glass Substrate: High-purity, colorless transparent fused silica glass
-
Glass Thickness: 2.00 mm (± 0.1mm margin)
-
Peak Transmittance: >90%
-
Blocking Depth: OD 5.0 cut-off depth across the 200–1100nm spectrum
-
Optical Precision Quality: Symmetrical parallelism and a 60/40 optical surface finish for sharp, non-bloated star profiles
-
Coating Technology: Dense, uniform Ion-Assisted Deposition (IAD) multi-layer coating system
-
Halo Suppression System: Advanced anti-reflection (AR) coating
-
Stray Light Control: High-strength aluminum alloy cell finished with a specialized internal matte black treatment
-
Sensor Compatibility: Full-Frame, APS-C, and smaller One-Shot Color (OSC)
-
Installation Direction: Bidirectional coating engineering allows flexible setup; simply secure it with the threaded side facing toward your camera sensor
| Manufacturer | ToupTek |
|---|
- 1x PureSight filter
- 1x Plastic case for storage
- Optimized for Fast Optics and engineered for high-performance on fast telescops from f/3.2 down to f/2.8
- Ultra-Narrow 5nm Bandpass drastically cuts through extreme city light pollution while maximizing weak nebula signals
- Advanced Halo Suppression with multi-layer anti-reflection coatings to eliminate internal reflections and star ghosting
ToupTek Astro PureSight A1 Dual Narrowband Filter - 2"
The ToupTek Astro PureSight A1 Hα & OIII Dual Narrowband Filter is designed for deep-sky astrophotography under light-polluted skies. With a precise 5nm bandpass and optimization for fast optical systems, it enhances nebula contrast while effectively suppressing unwanted background light.
A dual narrowband filter is an astrophotography filter designed to isolate specific emission wavelengths, typically hydrogen-alpha (Hα) and oxygen III (OIII). By transmitting only these narrow spectral bands, the filter significantly enhances the visibility of emission nebulae while suppressing background light pollution. Dual narrowband filters are widely used for deep-sky astrophotography, especially when imaging nebulae from urban or suburban locations where sky brightness can reduce contrast!
ToupTek PureSight A1 put to the Test!
SH2-308 (Bortle 4.9)
Rosette Nebula (Full Moon)
Exceptional Image Purity
- High-purity fused silica substrate combined with IAD (Ion Assisted Deposition) coating for dense and uniform layers.
- Advanced anti-reflection coatings significantly reduce internal reflections, halos, and ghosting.
- ≥90% peak transmission, ≤30" parallelism, and 60/40 surface quality ensure a clean background and sharp stars.
- Capture faint nebula details even from urban balconies or city skies.
Fast Optical Systems
ToupTek Astro PureSight A1 Hα & OIII Dual Narrowband 5nm F/3.2 Astronomical Filter is engineered specifically for astrophotography with fast optical systems.
With precisely controlled 5nm FWHM bandpasses and center wavelengths optimized for fast optics, the filter delivers excellent performance on systems from F/3.2 and faster, achieving an ideal balance between strong light-pollution suppression and high signal transmission.
Advanced anti-reflection coatings and carefully controlled surface precision significantly reduce internal reflections, effectively suppressing halos and ghosting. The result is clean backgrounds, high contrast, and sharp stars, even when imaging from urban or suburban locations.
Installation
ToupTek Astro PureSight A1 5nm Hα & [OIII] Dual Narrowband Filter features a specialized coating process that eliminates the need to identify front or back—simply screw it in for quick and easy installation.
The filter comes standard with a 2-inch housing and M48×0.75 thread, ensuring direct compatibility with most astrophotography accessories. During installation, please ensure that the threaded side faces the camera sensor.
Specifications
-
Filter Type: Dual-Narrowband (Hα + OIII)
-
Size Configuration: 2-inch
-
Filter Thread: M48 x 0.75
- Clear Aperture: 43.9 mm
-
Bandpass Width (FWHM): 5.0nm
-
Target Emission Lines:
-
Hydrogen-Alpha (Hα) at 656.3nm
-
Oxygen III (OIII) at 500.7nm
-
-
Optical Optimization: Optimized for f/3.2 and faster (with stable, verified mapping down to f/2.8)
-
Glass Substrate: High-purity, colorless transparent fused silica glass
-
Glass Thickness: 2.00 mm (± 0.1mm margin)
-
Peak Transmittance: >90%
-
Blocking Depth: OD 5.0 cut-off depth across the 200–1100nm spectrum
-
Optical Precision Quality: Symmetrical parallelism and a 60/40 optical surface finish for sharp, non-bloated star profiles
-
Coating Technology: Dense, uniform Ion-Assisted Deposition (IAD) multi-layer coating system
-
Halo Suppression System: Advanced anti-reflection (AR) coating
-
Stray Light Control: High-strength aluminum alloy cell finished with a specialized internal matte black treatment
-
Sensor Compatibility: Full-Frame, APS-C, and smaller One-Shot Color (OSC)
-
Installation Direction: Bidirectional coating engineering allows flexible setup; simply secure it with the threaded side facing toward your camera sensor
Other Information
- Country of Manufacture: China
| Manufacturer | ToupTek |
|---|
- 1x PureSight filter
- 1x Plastic case for storage
ToupTek PureSight A1 Dual Band H-a & OIII 5nm Filter - 2" Mounted