Sky-Watcher Heliostar 76Ha H-Alpha Solar Telescope
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- 76mm aperture, 630mm focal length, f/8.3
- Sub-0.55Å bandpass with integrated Solis Etalon Technology and Trifid Tuner
- H-alpha fully multicoated achromatic doublet lens
- Integrated Heliostar solar finder, tube rings, and carry handle
- Robust 2-inch dual-speed Crayford focuser
- Lab tested to ISO 12312-2 standards, and individually Sun tested unit by unit
- Official solar telescope of the Charlie Bates Solar Astronomy Project
- This listing is the Telescope only, bundle available here w/ Sky-Watcher SolarQuest sun tracking mount
Sky-Watcher Heliostar 76Ha: Serious Solar Detail, Made Simple
The Sky-Watcher Heliostar 76mm is a dedicated hydrogen-alpha solar telescope built for both visual observing and imaging. A standard white light filter shows the Sun's surface, but the Heliostar works in a narrow wavelength of light that reveals the layer above it, where prominences, filaments, plage, sunspot activity, and surface granulation all become visible with striking clarity. The 76mm aperture delivers the resolution to see that detail sharply, and the scope arrives tuned, tested, and ready to use right out of the box.
Take a closer look at the Sky-Watcher Heliostar 76Ha with Mack from Agena Astro!
Explore the Advantages of H-alpha
Powerful Etalon
Sky-Watcher's Solis Etalon Technology is a new approach to H-alpha filter design that achieves sharp surface detail and strong surface brightness from a single etalon stage. The result is a scope that performs well for both visual observing and solar photography without compromise.
Tuned and Tested
Every unit is lab tested to ISO 12312-2 standards in the United States, then verified one by one on the actual Sun before it ships. The scope you receive has been confirmed safe and ready for solar observing, not just certified on paper.
Loaded with Accessories
The Heliostar 76Hα ships in a rugged hard-shell case with mounting rings, a V-style dovetail, the Heliostar solar finder, a clip-on sunshade, a 20mm 70° eyepiece, and a camera phone adapter. Everything needed for a first session is included.
Hydrogen-Alpha Solar Observing
Sunlight spans a broad range of wavelengths, but a hydrogen-alpha telescope transmits just one: a deep-red wavelength at 656.3 nm that hydrogen atoms in the Sun's atmosphere naturally emit. Filtering down to this single wavelength changes which part of the Sun becomes visible. The Heliostar targets the specific layer just above that surface, called the chromosphere, where the most dramatic prominences, filaments, and other complex solar activity takes place!
Solis Etalon Technology
For decades, solar telescope buyers faced a real tradeoff. A single etalon produces bright, contrasty views of prominences but softer surface detail. Adding a second etalon sharpens surface contrast noticeably, but it also cuts the overall brightness of the system by close to 40 percent. Sky-Watcher's Solis Etalon Technology was developed to resolve that tradeoff. A single etalon achieves a sub-0.55Å bandpass on its own, delivering the surface contrast associated with double stack systems while preserving brightness and eliminating the cost of a second filter stage.
The Trifid Tuner
This unique design evenly applies controlled mechanical pressure to the etalon plates to fine-tune the wavelength being transmitted. This allows quick and easy centering on the target hydrogen line, and makes it easy to adjust your scope for maximum performance. Three internal support veins distribute that pressure and hold the etalon securely in place without stressing the surrounding optics.
Excellent Optics and a Robust Focuser
The Heliostar 76Hα uses an H-alpha fully multicoated achromatic doublet lens in a self-aligning cell, which means no collimation is ever required. The optics are diffraction limited at 1/4 wave. The 76mm aperture and 630mm focal length produce an f/8.3 focal ratio and a 6mm solar image at the focal plane. A 2-inch dual-speed Crayford focuser handles focus for both visual observing and camera work, with the fine-speed adjustment making it straightforward to dial in precise focus at higher magnifications.
Safety and the Charlie Bates Solar Astronomy Project
The rigorous testing and certification of the Heliostar has earned it a place as the official solar telescope of the Charlie Bates Solar Astronomy Project. This veteran-run nonprofit was founded in 2008 and has brought solar astronomy education to hundreds of thousands of participants across 27 countries.
Even with high safety standards like those on the Heliostar 76, solar observation always requires careful attention and proper technique. Please never attempt to view the sun directly or with any instrument not specifically engineered for this purpose.
Specifications
Optical Specifications
- Optical Design: Achromatic
- Lens Coating: H-alpha fully multicoated
- Lens Design: Doublet
- Optical Quality: Diffraction limited (1/4 wave)
- Collimatable Cell: No (Self Aligning Cell)
- Primary Aperture: 76mm
- F/Ratio: 8.3
- Focal Length: 630mm
- Blocking Filter Size: 11.5mm
- Solar Image Size: 6mm
- Bandpass: < 0.55Å
Mechanical Specifications
- Focuser Type: Crayford
- Focuser Size: 2"
- Focuser: Dual or Single Speed
- Compression Ring: No* (Only on diagonal)
- OTA material: Aluminum
- Optical Tube length (inches): 24
- Optical Tube weight (pounds): 8.4
- Mounting Rings: Included
- Dovetail type: V-style
- Tripod: Not Included
- Mount Head: Not Included
Observational Info
- Dawes Limit: 1.52
- Rayleigh Limit: 1.84
- Limiting Magnitude: 11.88
- Minimum Magnification: 7x
- Maximum Magnification: 150x
- Magnification with included eyepieces: 32x
- Intended use: Solar (visual & Imaging)
Frequently Asked Questions
What solar features are visible through the Heliostar that a white light filter cannot show?
White light filters reveal photospheric detail, primarily sunspots and surface granulation. The Heliostar operates in hydrogen-alpha and gives access to the chromosphere, where prominences, dark filaments, bright plage regions, and the activity surrounding solar flares all become visible with a level of clarity that broadband solar viewing cannot match.
What magnification range does the Heliostar support?
The optical system supports a range of 7x to 150x, with the included 20mm eyepiece producing 32x. Atmospheric turbulence during daylight hours often limits practical magnification well below the theoretical maximum, so moderate power frequently produces the sharpest results under typical seeing conditions.
How does the Heliostar 76 attach to a mount?
The scope ships with a standard V-style dovetail bar, which fits most equatorial and alt-azimuth mounts that accept that format. Sky-Watcher's SolarQuest mount is the purpose-built companion, offering automated solar acquisition and tracking for a fully dedicated portable solar setup.
Why is the included diagonal not interchangeable with other diagonals?
The 11.5mm blocking filter integrated into the supplied diagonal is not a convenience accessory. It is a required part of the Heliostar's optical safety system, blocking the solar energy that the etalon does not transmit. Replacing it with a standard diagonal removes that protection entirely and creates a serious risk of permanent eye injury.
What imaging options does the Heliostar support?
The telescope is rated for both visual and imaging use. The included camera phone adapter supports casual capture, and the 2-inch Crayford focuser accepts dedicated astronomical cameras for more demanding solar photography. The 76mm aperture provides sufficient resolution for detailed disk and prominence imaging.
Does the Solis Etalon or Trifid Tuner require any maintenance between sessions?
Neither component requires routine servicing. The Trifid Tuner is the day-to-day adjustment for keeping the transmitted wavelength centered on the H-alpha line as atmospheric conditions change. The self-aligning cell means collimation is never a consideration, so preparation between sessions is limited to standard cleaning and storage practices.
Other Information
- Country of Manufacture: China
Sky-Watcher Heliostar 76Ha: Serious Solar Detail, Made Simple
The Sky-Watcher Heliostar 76mm is a dedicated hydrogen-alpha solar telescope built for both visual observing and imaging. A standard white light filter shows the Sun's surface, but the Heliostar works in a narrow wavelength of light that reveals the layer above it, where prominences, filaments, plage, sunspot activity, and surface granulation all become visible with striking clarity. The 76mm aperture delivers the resolution to see that detail sharply, and the scope arrives tuned, tested, and ready to use right out of the box.
Take a closer look at the Sky-Watcher Heliostar 76Ha with Mack from Agena Astro!
Explore the Advantages of H-alpha
Powerful Etalon
Sky-Watcher's Solis Etalon Technology is a new approach to H-alpha filter design that achieves sharp surface detail and strong surface brightness from a single etalon stage. The result is a scope that performs well for both visual observing and solar photography without compromise.
Tuned and Tested
Every unit is lab tested to ISO 12312-2 standards in the United States, then verified one by one on the actual Sun before it ships. The scope you receive has been confirmed safe and ready for solar observing, not just certified on paper.
Loaded with Accessories
The Heliostar 76Hα ships in a rugged hard-shell case with mounting rings, a V-style dovetail, the Heliostar solar finder, a clip-on sunshade, a 20mm 70° eyepiece, and a camera phone adapter. Everything needed for a first session is included.
Hydrogen-Alpha Solar Observing
Sunlight spans a broad range of wavelengths, but a hydrogen-alpha telescope transmits just one: a deep-red wavelength at 656.3 nm that hydrogen atoms in the Sun's atmosphere naturally emit. Filtering down to this single wavelength changes which part of the Sun becomes visible. The Heliostar targets the specific layer just above that surface, called the chromosphere, where the most dramatic prominences, filaments, and other complex solar activity takes place!
Solis Etalon Technology
For decades, solar telescope buyers faced a real tradeoff. A single etalon produces bright, contrasty views of prominences but softer surface detail. Adding a second etalon sharpens surface contrast noticeably, but it also cuts the overall brightness of the system by close to 40 percent. Sky-Watcher's Solis Etalon Technology was developed to resolve that tradeoff. A single etalon achieves a sub-0.55Å bandpass on its own, delivering the surface contrast associated with double stack systems while preserving brightness and eliminating the cost of a second filter stage.
The Trifid Tuner
This unique design evenly applies controlled mechanical pressure to the etalon plates to fine-tune the wavelength being transmitted. This allows quick and easy centering on the target hydrogen line, and makes it easy to adjust your scope for maximum performance. Three internal support veins distribute that pressure and hold the etalon securely in place without stressing the surrounding optics.
Excellent Optics and a Robust Focuser
The Heliostar 76Hα uses an H-alpha fully multicoated achromatic doublet lens in a self-aligning cell, which means no collimation is ever required. The optics are diffraction limited at 1/4 wave. The 76mm aperture and 630mm focal length produce an f/8.3 focal ratio and a 6mm solar image at the focal plane. A 2-inch dual-speed Crayford focuser handles focus for both visual observing and camera work, with the fine-speed adjustment making it straightforward to dial in precise focus at higher magnifications.
Safety and the Charlie Bates Solar Astronomy Project
The rigorous testing and certification of the Heliostar has earned it a place as the official solar telescope of the Charlie Bates Solar Astronomy Project. This veteran-run nonprofit was founded in 2008 and has brought solar astronomy education to hundreds of thousands of participants across 27 countries.
Even with high safety standards like those on the Heliostar 76, solar observation always requires careful attention and proper technique. Please never attempt to view the sun directly or with any instrument not specifically engineered for this purpose.
Specifications
Optical Specifications
- Optical Design: Achromatic
- Lens Coating: H-alpha fully multicoated
- Lens Design: Doublet
- Optical Quality: Diffraction limited (1/4 wave)
- Collimatable Cell: No (Self Aligning Cell)
- Primary Aperture: 76mm
- F/Ratio: 8.3
- Focal Length: 630mm
- Blocking Filter Size: 11.5mm
- Solar Image Size: 6mm
- Bandpass: < 0.55Å
Mechanical Specifications
- Focuser Type: Crayford
- Focuser Size: 2"
- Focuser: Dual or Single Speed
- Compression Ring: No* (Only on diagonal)
- OTA material: Aluminum
- Optical Tube length (inches): 24
- Optical Tube weight (pounds): 8.4
- Mounting Rings: Included
- Dovetail type: V-style
- Tripod: Not Included
- Mount Head: Not Included
Observational Info
- Dawes Limit: 1.52
- Rayleigh Limit: 1.84
- Limiting Magnitude: 11.88
- Minimum Magnification: 7x
- Maximum Magnification: 150x
- Magnification with included eyepieces: 32x
- Intended use: Solar (visual & Imaging)
Frequently Asked Questions
What solar features are visible through the Heliostar that a white light filter cannot show?
White light filters reveal photospheric detail, primarily sunspots and surface granulation. The Heliostar operates in hydrogen-alpha and gives access to the chromosphere, where prominences, dark filaments, bright plage regions, and the activity surrounding solar flares all become visible with a level of clarity that broadband solar viewing cannot match.
What magnification range does the Heliostar support?
The optical system supports a range of 7x to 150x, with the included 20mm eyepiece producing 32x. Atmospheric turbulence during daylight hours often limits practical magnification well below the theoretical maximum, so moderate power frequently produces the sharpest results under typical seeing conditions.
How does the Heliostar 76 attach to a mount?
The scope ships with a standard V-style dovetail bar, which fits most equatorial and alt-azimuth mounts that accept that format. Sky-Watcher's SolarQuest mount is the purpose-built companion, offering automated solar acquisition and tracking for a fully dedicated portable solar setup.
Why is the included diagonal not interchangeable with other diagonals?
The 11.5mm blocking filter integrated into the supplied diagonal is not a convenience accessory. It is a required part of the Heliostar's optical safety system, blocking the solar energy that the etalon does not transmit. Replacing it with a standard diagonal removes that protection entirely and creates a serious risk of permanent eye injury.
What imaging options does the Heliostar support?
The telescope is rated for both visual and imaging use. The included camera phone adapter supports casual capture, and the 2-inch Crayford focuser accepts dedicated astronomical cameras for more demanding solar photography. The 76mm aperture provides sufficient resolution for detailed disk and prominence imaging.
Does the Solis Etalon or Trifid Tuner require any maintenance between sessions?
Neither component requires routine servicing. The Trifid Tuner is the day-to-day adjustment for keeping the transmitted wavelength centered on the H-alpha line as atmospheric conditions change. The self-aligning cell means collimation is never a consideration, so preparation between sessions is limited to standard cleaning and storage practices.
- 1x Optical tube assembly (OTA)
- 1x Mounting rings
- 1x V-style dovetail
- 1x Heliostar solar finder
- 1x 11.5mm 1.25" H-alpha blocking diagonal
- 1x Clip-on sunshade
- 1x 20mm 70° 1.25" eyepiece
- 1x Camera phone adapter
- 1x Hard-shell carrying case
- 76mm aperture, 630mm focal length, f/8.3
- Sub-0.55Å bandpass with integrated Solis Etalon Technology and Trifid Tuner
- H-alpha fully multicoated achromatic doublet lens
- Integrated Heliostar solar finder, tube rings, and carry handle
- Robust 2-inch dual-speed Crayford focuser
- Lab tested to ISO 12312-2 standards, and individually Sun tested unit by unit
- Official solar telescope of the Charlie Bates Solar Astronomy Project
- This listing is the Telescope only, bundle available here w/ Sky-Watcher SolarQuest sun tracking mount
Sky-Watcher Heliostar 76Ha: Serious Solar Detail, Made Simple
The Sky-Watcher Heliostar 76mm is a dedicated hydrogen-alpha solar telescope built for both visual observing and imaging. A standard white light filter shows the Sun's surface, but the Heliostar works in a narrow wavelength of light that reveals the layer above it, where prominences, filaments, plage, sunspot activity, and surface granulation all become visible with striking clarity. The 76mm aperture delivers the resolution to see that detail sharply, and the scope arrives tuned, tested, and ready to use right out of the box.
Take a closer look at the Sky-Watcher Heliostar 76Ha with Mack from Agena Astro!
Explore the Advantages of H-alpha
Powerful Etalon
Sky-Watcher's Solis Etalon Technology is a new approach to H-alpha filter design that achieves sharp surface detail and strong surface brightness from a single etalon stage. The result is a scope that performs well for both visual observing and solar photography without compromise.
Tuned and Tested
Every unit is lab tested to ISO 12312-2 standards in the United States, then verified one by one on the actual Sun before it ships. The scope you receive has been confirmed safe and ready for solar observing, not just certified on paper.
Loaded with Accessories
The Heliostar 76Hα ships in a rugged hard-shell case with mounting rings, a V-style dovetail, the Heliostar solar finder, a clip-on sunshade, a 20mm 70° eyepiece, and a camera phone adapter. Everything needed for a first session is included.
Hydrogen-Alpha Solar Observing
Sunlight spans a broad range of wavelengths, but a hydrogen-alpha telescope transmits just one: a deep-red wavelength at 656.3 nm that hydrogen atoms in the Sun's atmosphere naturally emit. Filtering down to this single wavelength changes which part of the Sun becomes visible. The Heliostar targets the specific layer just above that surface, called the chromosphere, where the most dramatic prominences, filaments, and other complex solar activity takes place!
Solis Etalon Technology
For decades, solar telescope buyers faced a real tradeoff. A single etalon produces bright, contrasty views of prominences but softer surface detail. Adding a second etalon sharpens surface contrast noticeably, but it also cuts the overall brightness of the system by close to 40 percent. Sky-Watcher's Solis Etalon Technology was developed to resolve that tradeoff. A single etalon achieves a sub-0.55Å bandpass on its own, delivering the surface contrast associated with double stack systems while preserving brightness and eliminating the cost of a second filter stage.
The Trifid Tuner
This unique design evenly applies controlled mechanical pressure to the etalon plates to fine-tune the wavelength being transmitted. This allows quick and easy centering on the target hydrogen line, and makes it easy to adjust your scope for maximum performance. Three internal support veins distribute that pressure and hold the etalon securely in place without stressing the surrounding optics.
Excellent Optics and a Robust Focuser
The Heliostar 76Hα uses an H-alpha fully multicoated achromatic doublet lens in a self-aligning cell, which means no collimation is ever required. The optics are diffraction limited at 1/4 wave. The 76mm aperture and 630mm focal length produce an f/8.3 focal ratio and a 6mm solar image at the focal plane. A 2-inch dual-speed Crayford focuser handles focus for both visual observing and camera work, with the fine-speed adjustment making it straightforward to dial in precise focus at higher magnifications.
Safety and the Charlie Bates Solar Astronomy Project
The rigorous testing and certification of the Heliostar has earned it a place as the official solar telescope of the Charlie Bates Solar Astronomy Project. This veteran-run nonprofit was founded in 2008 and has brought solar astronomy education to hundreds of thousands of participants across 27 countries.
Even with high safety standards like those on the Heliostar 76, solar observation always requires careful attention and proper technique. Please never attempt to view the sun directly or with any instrument not specifically engineered for this purpose.
Specifications
Optical Specifications
- Optical Design: Achromatic
- Lens Coating: H-alpha fully multicoated
- Lens Design: Doublet
- Optical Quality: Diffraction limited (1/4 wave)
- Collimatable Cell: No (Self Aligning Cell)
- Primary Aperture: 76mm
- F/Ratio: 8.3
- Focal Length: 630mm
- Blocking Filter Size: 11.5mm
- Solar Image Size: 6mm
- Bandpass: < 0.55Å
Mechanical Specifications
- Focuser Type: Crayford
- Focuser Size: 2"
- Focuser: Dual or Single Speed
- Compression Ring: No* (Only on diagonal)
- OTA material: Aluminum
- Optical Tube length (inches): 24
- Optical Tube weight (pounds): 8.4
- Mounting Rings: Included
- Dovetail type: V-style
- Tripod: Not Included
- Mount Head: Not Included
Observational Info
- Dawes Limit: 1.52
- Rayleigh Limit: 1.84
- Limiting Magnitude: 11.88
- Minimum Magnification: 7x
- Maximum Magnification: 150x
- Magnification with included eyepieces: 32x
- Intended use: Solar (visual & Imaging)
Frequently Asked Questions
What solar features are visible through the Heliostar that a white light filter cannot show?
White light filters reveal photospheric detail, primarily sunspots and surface granulation. The Heliostar operates in hydrogen-alpha and gives access to the chromosphere, where prominences, dark filaments, bright plage regions, and the activity surrounding solar flares all become visible with a level of clarity that broadband solar viewing cannot match.
What magnification range does the Heliostar support?
The optical system supports a range of 7x to 150x, with the included 20mm eyepiece producing 32x. Atmospheric turbulence during daylight hours often limits practical magnification well below the theoretical maximum, so moderate power frequently produces the sharpest results under typical seeing conditions.
How does the Heliostar 76 attach to a mount?
The scope ships with a standard V-style dovetail bar, which fits most equatorial and alt-azimuth mounts that accept that format. Sky-Watcher's SolarQuest mount is the purpose-built companion, offering automated solar acquisition and tracking for a fully dedicated portable solar setup.
Why is the included diagonal not interchangeable with other diagonals?
The 11.5mm blocking filter integrated into the supplied diagonal is not a convenience accessory. It is a required part of the Heliostar's optical safety system, blocking the solar energy that the etalon does not transmit. Replacing it with a standard diagonal removes that protection entirely and creates a serious risk of permanent eye injury.
What imaging options does the Heliostar support?
The telescope is rated for both visual and imaging use. The included camera phone adapter supports casual capture, and the 2-inch Crayford focuser accepts dedicated astronomical cameras for more demanding solar photography. The 76mm aperture provides sufficient resolution for detailed disk and prominence imaging.
Does the Solis Etalon or Trifid Tuner require any maintenance between sessions?
Neither component requires routine servicing. The Trifid Tuner is the day-to-day adjustment for keeping the transmitted wavelength centered on the H-alpha line as atmospheric conditions change. The self-aligning cell means collimation is never a consideration, so preparation between sessions is limited to standard cleaning and storage practices.
Other Information
- Country of Manufacture: China
| Telescope Focal Length | 601 - 700mm |
|---|
- 1x Optical tube assembly (OTA)
- 1x Mounting rings
- 1x V-style dovetail
- 1x Heliostar solar finder
- 1x 11.5mm 1.25" H-alpha blocking diagonal
- 1x Clip-on sunshade
- 1x 20mm 70° 1.25" eyepiece
- 1x Camera phone adapter
- 1x Hard-shell carrying case
Sky-Watcher Heliostar 76Ha H-Alpha Solar Telescope